1 //===-- AArch6464FastISel.cpp - AArch64 FastISel implementation -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the AArch64-specific support for the FastISel class. Some
11 // of the target-specific code is generated by tablegen in the file
12 // AArch64GenFastISel.inc, which is #included here.
14 //===----------------------------------------------------------------------===//
17 #include "AArch64Subtarget.h"
18 #include "AArch64TargetMachine.h"
19 #include "MCTargetDesc/AArch64AddressingModes.h"
20 #include "llvm/Analysis/BranchProbabilityInfo.h"
21 #include "llvm/CodeGen/CallingConvLower.h"
22 #include "llvm/CodeGen/FastISel.h"
23 #include "llvm/CodeGen/FunctionLoweringInfo.h"
24 #include "llvm/CodeGen/MachineConstantPool.h"
25 #include "llvm/CodeGen/MachineFrameInfo.h"
26 #include "llvm/CodeGen/MachineInstrBuilder.h"
27 #include "llvm/CodeGen/MachineRegisterInfo.h"
28 #include "llvm/IR/CallingConv.h"
29 #include "llvm/IR/DataLayout.h"
30 #include "llvm/IR/DerivedTypes.h"
31 #include "llvm/IR/Function.h"
32 #include "llvm/IR/GetElementPtrTypeIterator.h"
33 #include "llvm/IR/GlobalAlias.h"
34 #include "llvm/IR/GlobalVariable.h"
35 #include "llvm/IR/Instructions.h"
36 #include "llvm/IR/IntrinsicInst.h"
37 #include "llvm/IR/Operator.h"
38 #include "llvm/Support/CommandLine.h"
43 class AArch64FastISel final : public FastISel {
53 AArch64_AM::ShiftExtendType ExtType;
61 const GlobalValue *GV;
64 Address() : Kind(RegBase), ExtType(AArch64_AM::InvalidShiftExtend),
65 OffsetReg(0), Shift(0), Offset(0), GV(nullptr) { Base.Reg = 0; }
66 void setKind(BaseKind K) { Kind = K; }
67 BaseKind getKind() const { return Kind; }
68 void setExtendType(AArch64_AM::ShiftExtendType E) { ExtType = E; }
69 AArch64_AM::ShiftExtendType getExtendType() const { return ExtType; }
70 bool isRegBase() const { return Kind == RegBase; }
71 bool isFIBase() const { return Kind == FrameIndexBase; }
72 void setReg(unsigned Reg) {
73 assert(isRegBase() && "Invalid base register access!");
76 unsigned getReg() const {
77 assert(isRegBase() && "Invalid base register access!");
80 void setOffsetReg(unsigned Reg) {
81 assert(isRegBase() && "Invalid offset register access!");
84 unsigned getOffsetReg() const {
85 assert(isRegBase() && "Invalid offset register access!");
88 void setFI(unsigned FI) {
89 assert(isFIBase() && "Invalid base frame index access!");
92 unsigned getFI() const {
93 assert(isFIBase() && "Invalid base frame index access!");
96 void setOffset(int64_t O) { Offset = O; }
97 int64_t getOffset() { return Offset; }
98 void setShift(unsigned S) { Shift = S; }
99 unsigned getShift() { return Shift; }
101 void setGlobalValue(const GlobalValue *G) { GV = G; }
102 const GlobalValue *getGlobalValue() { return GV; }
105 /// Subtarget - Keep a pointer to the AArch64Subtarget around so that we can
106 /// make the right decision when generating code for different targets.
107 const AArch64Subtarget *Subtarget;
108 LLVMContext *Context;
110 bool fastLowerArguments() override;
111 bool fastLowerCall(CallLoweringInfo &CLI) override;
112 bool fastLowerIntrinsicCall(const IntrinsicInst *II) override;
115 // Selection routines.
116 bool selectAddSub(const Instruction *I);
117 bool selectLogicalOp(const Instruction *I);
118 bool SelectLoad(const Instruction *I);
119 bool SelectStore(const Instruction *I);
120 bool SelectBranch(const Instruction *I);
121 bool SelectIndirectBr(const Instruction *I);
122 bool SelectCmp(const Instruction *I);
123 bool SelectSelect(const Instruction *I);
124 bool SelectFPExt(const Instruction *I);
125 bool SelectFPTrunc(const Instruction *I);
126 bool SelectFPToInt(const Instruction *I, bool Signed);
127 bool SelectIntToFP(const Instruction *I, bool Signed);
128 bool SelectRem(const Instruction *I, unsigned ISDOpcode);
129 bool SelectRet(const Instruction *I);
130 bool SelectTrunc(const Instruction *I);
131 bool SelectIntExt(const Instruction *I);
132 bool SelectMul(const Instruction *I);
133 bool SelectShift(const Instruction *I);
134 bool SelectBitCast(const Instruction *I);
135 bool selectFRem(const Instruction *I);
137 // Utility helper routines.
138 bool isTypeLegal(Type *Ty, MVT &VT);
139 bool isTypeSupported(Type *Ty, MVT &VT, bool IsVectorAllowed = false);
140 bool isValueAvailable(const Value *V) const;
141 bool ComputeAddress(const Value *Obj, Address &Addr, Type *Ty = nullptr);
142 bool ComputeCallAddress(const Value *V, Address &Addr);
143 bool SimplifyAddress(Address &Addr, MVT VT);
144 void AddLoadStoreOperands(Address &Addr, const MachineInstrBuilder &MIB,
145 unsigned Flags, unsigned ScaleFactor,
146 MachineMemOperand *MMO);
147 bool IsMemCpySmall(uint64_t Len, unsigned Alignment);
148 bool TryEmitSmallMemCpy(Address Dest, Address Src, uint64_t Len,
150 bool foldXALUIntrinsic(AArch64CC::CondCode &CC, const Instruction *I,
153 // Emit helper routines.
154 unsigned emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS,
155 const Value *RHS, bool SetFlags = false,
156 bool WantResult = true, bool IsZExt = false);
157 unsigned emitAddSub_rr(bool UseAdd, MVT RetVT, unsigned LHSReg,
158 bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
159 bool SetFlags = false, bool WantResult = true);
160 unsigned emitAddSub_ri(bool UseAdd, MVT RetVT, unsigned LHSReg,
161 bool LHSIsKill, uint64_t Imm, bool SetFlags = false,
162 bool WantResult = true);
163 unsigned emitAddSub_rs(bool UseAdd, MVT RetVT, unsigned LHSReg,
164 bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
165 AArch64_AM::ShiftExtendType ShiftType,
166 uint64_t ShiftImm, bool SetFlags = false,
167 bool WantResult = true);
168 unsigned emitAddSub_rx(bool UseAdd, MVT RetVT, unsigned LHSReg,
169 bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
170 AArch64_AM::ShiftExtendType ExtType,
171 uint64_t ShiftImm, bool SetFlags = false,
172 bool WantResult = true);
175 bool emitCmp(const Value *LHS, const Value *RHS, bool IsZExt);
176 bool emitICmp(MVT RetVT, const Value *LHS, const Value *RHS, bool IsZExt);
177 bool emitICmp_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, uint64_t Imm);
178 bool emitFCmp(MVT RetVT, const Value *LHS, const Value *RHS);
179 bool EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
180 MachineMemOperand *MMO = nullptr);
181 bool EmitStore(MVT VT, unsigned SrcReg, Address Addr,
182 MachineMemOperand *MMO = nullptr);
183 unsigned EmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT, bool isZExt);
184 unsigned Emiti1Ext(unsigned SrcReg, MVT DestVT, bool isZExt);
185 unsigned emitAdd(MVT RetVT, const Value *LHS, const Value *RHS,
186 bool SetFlags = false, bool WantResult = true,
187 bool IsZExt = false);
188 unsigned emitSub(MVT RetVT, const Value *LHS, const Value *RHS,
189 bool SetFlags = false, bool WantResult = true,
190 bool IsZExt = false);
191 unsigned emitSubs_rr(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
192 unsigned RHSReg, bool RHSIsKill, bool WantResult = true);
193 unsigned emitSubs_rs(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
194 unsigned RHSReg, bool RHSIsKill,
195 AArch64_AM::ShiftExtendType ShiftType, uint64_t ShiftImm,
196 bool WantResult = true);
197 unsigned emitLogicalOp(unsigned ISDOpc, MVT RetVT, const Value *LHS,
199 unsigned emitLogicalOp_ri(unsigned ISDOpc, MVT RetVT, unsigned LHSReg,
200 bool LHSIsKill, uint64_t Imm);
201 unsigned emitLogicalOp_rs(unsigned ISDOpc, MVT RetVT, unsigned LHSReg,
202 bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
204 unsigned emitAnd_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, uint64_t Imm);
205 unsigned Emit_MUL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
206 unsigned Op1, bool Op1IsKill);
207 unsigned Emit_SMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
208 unsigned Op1, bool Op1IsKill);
209 unsigned Emit_UMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
210 unsigned Op1, bool Op1IsKill);
211 unsigned emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
212 unsigned Op1Reg, bool Op1IsKill);
213 unsigned emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
214 uint64_t Imm, bool IsZExt = true);
215 unsigned emitLSR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
216 unsigned Op1Reg, bool Op1IsKill);
217 unsigned emitLSR_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
218 uint64_t Imm, bool IsZExt = true);
219 unsigned emitASR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
220 unsigned Op1Reg, bool Op1IsKill);
221 unsigned emitASR_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
222 uint64_t Imm, bool IsZExt = false);
224 unsigned AArch64MaterializeInt(const ConstantInt *CI, MVT VT);
225 unsigned AArch64MaterializeFP(const ConstantFP *CFP, MVT VT);
226 unsigned AArch64MaterializeGV(const GlobalValue *GV);
228 // Call handling routines.
230 CCAssignFn *CCAssignFnForCall(CallingConv::ID CC) const;
231 bool ProcessCallArgs(CallLoweringInfo &CLI, SmallVectorImpl<MVT> &ArgVTs,
233 bool FinishCall(CallLoweringInfo &CLI, MVT RetVT, unsigned NumBytes);
236 // Backend specific FastISel code.
237 unsigned fastMaterializeAlloca(const AllocaInst *AI) override;
238 unsigned fastMaterializeConstant(const Constant *C) override;
239 unsigned fastMaterializeFloatZero(const ConstantFP* CF) override;
241 explicit AArch64FastISel(FunctionLoweringInfo &FuncInfo,
242 const TargetLibraryInfo *LibInfo)
243 : FastISel(FuncInfo, LibInfo, /*SkipTargetIndependentISel=*/true) {
244 Subtarget = &TM.getSubtarget<AArch64Subtarget>();
245 Context = &FuncInfo.Fn->getContext();
248 bool fastSelectInstruction(const Instruction *I) override;
250 #include "AArch64GenFastISel.inc"
253 } // end anonymous namespace
255 #include "AArch64GenCallingConv.inc"
257 CCAssignFn *AArch64FastISel::CCAssignFnForCall(CallingConv::ID CC) const {
258 if (CC == CallingConv::WebKit_JS)
259 return CC_AArch64_WebKit_JS;
260 return Subtarget->isTargetDarwin() ? CC_AArch64_DarwinPCS : CC_AArch64_AAPCS;
263 unsigned AArch64FastISel::fastMaterializeAlloca(const AllocaInst *AI) {
264 assert(TLI.getValueType(AI->getType(), true) == MVT::i64 &&
265 "Alloca should always return a pointer.");
267 // Don't handle dynamic allocas.
268 if (!FuncInfo.StaticAllocaMap.count(AI))
271 DenseMap<const AllocaInst *, int>::iterator SI =
272 FuncInfo.StaticAllocaMap.find(AI);
274 if (SI != FuncInfo.StaticAllocaMap.end()) {
275 unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass);
276 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
278 .addFrameIndex(SI->second)
287 unsigned AArch64FastISel::AArch64MaterializeInt(const ConstantInt *CI, MVT VT) {
292 return fastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue());
294 // Create a copy from the zero register to materialize a "0" value.
295 const TargetRegisterClass *RC = (VT == MVT::i64) ? &AArch64::GPR64RegClass
296 : &AArch64::GPR32RegClass;
297 unsigned ZeroReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
298 unsigned ResultReg = createResultReg(RC);
299 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(TargetOpcode::COPY),
300 ResultReg).addReg(ZeroReg, getKillRegState(true));
304 unsigned AArch64FastISel::AArch64MaterializeFP(const ConstantFP *CFP, MVT VT) {
305 // Positive zero (+0.0) has to be materialized with a fmov from the zero
306 // register, because the immediate version of fmov cannot encode zero.
307 if (CFP->isNullValue())
308 return fastMaterializeFloatZero(CFP);
310 if (VT != MVT::f32 && VT != MVT::f64)
313 const APFloat Val = CFP->getValueAPF();
314 bool Is64Bit = (VT == MVT::f64);
315 // This checks to see if we can use FMOV instructions to materialize
316 // a constant, otherwise we have to materialize via the constant pool.
317 if (TLI.isFPImmLegal(Val, VT)) {
319 Is64Bit ? AArch64_AM::getFP64Imm(Val) : AArch64_AM::getFP32Imm(Val);
320 assert((Imm != -1) && "Cannot encode floating-point constant.");
321 unsigned Opc = Is64Bit ? AArch64::FMOVDi : AArch64::FMOVSi;
322 return fastEmitInst_i(Opc, TLI.getRegClassFor(VT), Imm);
325 // Materialize via constant pool. MachineConstantPool wants an explicit
327 unsigned Align = DL.getPrefTypeAlignment(CFP->getType());
329 Align = DL.getTypeAllocSize(CFP->getType());
331 unsigned CPI = MCP.getConstantPoolIndex(cast<Constant>(CFP), Align);
332 unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass);
333 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
334 ADRPReg).addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGE);
336 unsigned Opc = Is64Bit ? AArch64::LDRDui : AArch64::LDRSui;
337 unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT));
338 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
340 .addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
344 unsigned AArch64FastISel::AArch64MaterializeGV(const GlobalValue *GV) {
345 // We can't handle thread-local variables quickly yet.
346 if (GV->isThreadLocal())
349 // MachO still uses GOT for large code-model accesses, but ELF requires
350 // movz/movk sequences, which FastISel doesn't handle yet.
351 if (TM.getCodeModel() != CodeModel::Small && !Subtarget->isTargetMachO())
354 unsigned char OpFlags = Subtarget->ClassifyGlobalReference(GV, TM);
356 EVT DestEVT = TLI.getValueType(GV->getType(), true);
357 if (!DestEVT.isSimple())
360 unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass);
363 if (OpFlags & AArch64II::MO_GOT) {
365 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
367 .addGlobalAddress(GV, 0, AArch64II::MO_GOT | AArch64II::MO_PAGE);
369 ResultReg = createResultReg(&AArch64::GPR64RegClass);
370 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::LDRXui),
373 .addGlobalAddress(GV, 0, AArch64II::MO_GOT | AArch64II::MO_PAGEOFF |
375 } else if (OpFlags & AArch64II::MO_CONSTPOOL) {
376 // We can't handle addresses loaded from a constant pool quickly yet.
380 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
382 .addGlobalAddress(GV, 0, AArch64II::MO_PAGE);
384 ResultReg = createResultReg(&AArch64::GPR64spRegClass);
385 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
388 .addGlobalAddress(GV, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC)
394 unsigned AArch64FastISel::fastMaterializeConstant(const Constant *C) {
395 EVT CEVT = TLI.getValueType(C->getType(), true);
397 // Only handle simple types.
398 if (!CEVT.isSimple())
400 MVT VT = CEVT.getSimpleVT();
402 if (const auto *CI = dyn_cast<ConstantInt>(C))
403 return AArch64MaterializeInt(CI, VT);
404 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C))
405 return AArch64MaterializeFP(CFP, VT);
406 else if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
407 return AArch64MaterializeGV(GV);
412 unsigned AArch64FastISel::fastMaterializeFloatZero(const ConstantFP* CFP) {
413 assert(CFP->isNullValue() &&
414 "Floating-point constant is not a positive zero.");
416 if (!isTypeLegal(CFP->getType(), VT))
419 if (VT != MVT::f32 && VT != MVT::f64)
422 bool Is64Bit = (VT == MVT::f64);
423 unsigned ZReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
424 unsigned Opc = Is64Bit ? AArch64::FMOVXDr : AArch64::FMOVWSr;
425 return fastEmitInst_r(Opc, TLI.getRegClassFor(VT), ZReg, /*IsKill=*/true);
428 // Computes the address to get to an object.
429 bool AArch64FastISel::ComputeAddress(const Value *Obj, Address &Addr, Type *Ty)
431 const User *U = nullptr;
432 unsigned Opcode = Instruction::UserOp1;
433 if (const Instruction *I = dyn_cast<Instruction>(Obj)) {
434 // Don't walk into other basic blocks unless the object is an alloca from
435 // another block, otherwise it may not have a virtual register assigned.
436 if (FuncInfo.StaticAllocaMap.count(static_cast<const AllocaInst *>(Obj)) ||
437 FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) {
438 Opcode = I->getOpcode();
441 } else if (const ConstantExpr *C = dyn_cast<ConstantExpr>(Obj)) {
442 Opcode = C->getOpcode();
446 if (const PointerType *Ty = dyn_cast<PointerType>(Obj->getType()))
447 if (Ty->getAddressSpace() > 255)
448 // Fast instruction selection doesn't support the special
455 case Instruction::BitCast: {
456 // Look through bitcasts.
457 return ComputeAddress(U->getOperand(0), Addr, Ty);
459 case Instruction::IntToPtr: {
460 // Look past no-op inttoptrs.
461 if (TLI.getValueType(U->getOperand(0)->getType()) == TLI.getPointerTy())
462 return ComputeAddress(U->getOperand(0), Addr, Ty);
465 case Instruction::PtrToInt: {
466 // Look past no-op ptrtoints.
467 if (TLI.getValueType(U->getType()) == TLI.getPointerTy())
468 return ComputeAddress(U->getOperand(0), Addr, Ty);
471 case Instruction::GetElementPtr: {
472 Address SavedAddr = Addr;
473 uint64_t TmpOffset = Addr.getOffset();
475 // Iterate through the GEP folding the constants into offsets where
477 gep_type_iterator GTI = gep_type_begin(U);
478 for (User::const_op_iterator i = U->op_begin() + 1, e = U->op_end(); i != e;
480 const Value *Op = *i;
481 if (StructType *STy = dyn_cast<StructType>(*GTI)) {
482 const StructLayout *SL = DL.getStructLayout(STy);
483 unsigned Idx = cast<ConstantInt>(Op)->getZExtValue();
484 TmpOffset += SL->getElementOffset(Idx);
486 uint64_t S = DL.getTypeAllocSize(GTI.getIndexedType());
488 if (const ConstantInt *CI = dyn_cast<ConstantInt>(Op)) {
489 // Constant-offset addressing.
490 TmpOffset += CI->getSExtValue() * S;
493 if (canFoldAddIntoGEP(U, Op)) {
494 // A compatible add with a constant operand. Fold the constant.
496 cast<ConstantInt>(cast<AddOperator>(Op)->getOperand(1));
497 TmpOffset += CI->getSExtValue() * S;
498 // Iterate on the other operand.
499 Op = cast<AddOperator>(Op)->getOperand(0);
503 goto unsupported_gep;
508 // Try to grab the base operand now.
509 Addr.setOffset(TmpOffset);
510 if (ComputeAddress(U->getOperand(0), Addr, Ty))
513 // We failed, restore everything and try the other options.
519 case Instruction::Alloca: {
520 const AllocaInst *AI = cast<AllocaInst>(Obj);
521 DenseMap<const AllocaInst *, int>::iterator SI =
522 FuncInfo.StaticAllocaMap.find(AI);
523 if (SI != FuncInfo.StaticAllocaMap.end()) {
524 Addr.setKind(Address::FrameIndexBase);
525 Addr.setFI(SI->second);
530 case Instruction::Add: {
531 // Adds of constants are common and easy enough.
532 const Value *LHS = U->getOperand(0);
533 const Value *RHS = U->getOperand(1);
535 if (isa<ConstantInt>(LHS))
538 if (const ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) {
539 Addr.setOffset(Addr.getOffset() + (uint64_t)CI->getSExtValue());
540 return ComputeAddress(LHS, Addr, Ty);
543 Address Backup = Addr;
544 if (ComputeAddress(LHS, Addr, Ty) && ComputeAddress(RHS, Addr, Ty))
550 case Instruction::Shl:
551 if (Addr.getOffsetReg())
554 if (const auto *CI = dyn_cast<ConstantInt>(U->getOperand(1))) {
555 unsigned Val = CI->getZExtValue();
556 if (Val < 1 || Val > 3)
559 uint64_t NumBytes = 0;
560 if (Ty && Ty->isSized()) {
561 uint64_t NumBits = DL.getTypeSizeInBits(Ty);
562 NumBytes = NumBits / 8;
563 if (!isPowerOf2_64(NumBits))
567 if (NumBytes != (1ULL << Val))
571 Addr.setExtendType(AArch64_AM::LSL);
573 if (const auto *I = dyn_cast<Instruction>(U->getOperand(0)))
574 if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB)
577 if (const auto *ZE = dyn_cast<ZExtInst>(U))
578 if (ZE->getOperand(0)->getType()->isIntegerTy(32))
579 Addr.setExtendType(AArch64_AM::UXTW);
581 if (const auto *SE = dyn_cast<SExtInst>(U))
582 if (SE->getOperand(0)->getType()->isIntegerTy(32))
583 Addr.setExtendType(AArch64_AM::SXTW);
585 unsigned Reg = getRegForValue(U->getOperand(0));
588 Addr.setOffsetReg(Reg);
595 if (!Addr.getOffsetReg()) {
596 unsigned Reg = getRegForValue(Obj);
599 Addr.setOffsetReg(Reg);
605 unsigned Reg = getRegForValue(Obj);
612 bool AArch64FastISel::ComputeCallAddress(const Value *V, Address &Addr) {
613 const User *U = nullptr;
614 unsigned Opcode = Instruction::UserOp1;
617 if (const auto *I = dyn_cast<Instruction>(V)) {
618 Opcode = I->getOpcode();
620 InMBB = I->getParent() == FuncInfo.MBB->getBasicBlock();
621 } else if (const auto *C = dyn_cast<ConstantExpr>(V)) {
622 Opcode = C->getOpcode();
628 case Instruction::BitCast:
629 // Look past bitcasts if its operand is in the same BB.
631 return ComputeCallAddress(U->getOperand(0), Addr);
633 case Instruction::IntToPtr:
634 // Look past no-op inttoptrs if its operand is in the same BB.
636 TLI.getValueType(U->getOperand(0)->getType()) == TLI.getPointerTy())
637 return ComputeCallAddress(U->getOperand(0), Addr);
639 case Instruction::PtrToInt:
640 // Look past no-op ptrtoints if its operand is in the same BB.
642 TLI.getValueType(U->getType()) == TLI.getPointerTy())
643 return ComputeCallAddress(U->getOperand(0), Addr);
647 if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
648 Addr.setGlobalValue(GV);
652 // If all else fails, try to materialize the value in a register.
653 if (!Addr.getGlobalValue()) {
654 Addr.setReg(getRegForValue(V));
655 return Addr.getReg() != 0;
662 bool AArch64FastISel::isTypeLegal(Type *Ty, MVT &VT) {
663 EVT evt = TLI.getValueType(Ty, true);
665 // Only handle simple types.
666 if (evt == MVT::Other || !evt.isSimple())
668 VT = evt.getSimpleVT();
670 // This is a legal type, but it's not something we handle in fast-isel.
674 // Handle all other legal types, i.e. a register that will directly hold this
676 return TLI.isTypeLegal(VT);
679 /// \brief Determine if the value type is supported by FastISel.
681 /// FastISel for AArch64 can handle more value types than are legal. This adds
682 /// simple value type such as i1, i8, and i16.
683 bool AArch64FastISel::isTypeSupported(Type *Ty, MVT &VT, bool IsVectorAllowed) {
684 if (Ty->isVectorTy() && !IsVectorAllowed)
687 if (isTypeLegal(Ty, VT))
690 // If this is a type than can be sign or zero-extended to a basic operation
691 // go ahead and accept it now.
692 if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16)
698 bool AArch64FastISel::isValueAvailable(const Value *V) const {
699 if (!isa<Instruction>(V))
702 const auto *I = cast<Instruction>(V);
703 if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB)
709 bool AArch64FastISel::SimplifyAddress(Address &Addr, MVT VT) {
710 unsigned ScaleFactor;
711 switch (VT.SimpleTy) {
712 default: return false;
713 case MVT::i1: // fall-through
714 case MVT::i8: ScaleFactor = 1; break;
715 case MVT::i16: ScaleFactor = 2; break;
716 case MVT::i32: // fall-through
717 case MVT::f32: ScaleFactor = 4; break;
718 case MVT::i64: // fall-through
719 case MVT::f64: ScaleFactor = 8; break;
722 bool ImmediateOffsetNeedsLowering = false;
723 bool RegisterOffsetNeedsLowering = false;
724 int64_t Offset = Addr.getOffset();
725 if (((Offset < 0) || (Offset & (ScaleFactor - 1))) && !isInt<9>(Offset))
726 ImmediateOffsetNeedsLowering = true;
727 else if (Offset > 0 && !(Offset & (ScaleFactor - 1)) &&
728 !isUInt<12>(Offset / ScaleFactor))
729 ImmediateOffsetNeedsLowering = true;
731 // Cannot encode an offset register and an immediate offset in the same
732 // instruction. Fold the immediate offset into the load/store instruction and
733 // emit an additonal add to take care of the offset register.
734 if (!ImmediateOffsetNeedsLowering && Addr.getOffset() && Addr.isRegBase() &&
736 RegisterOffsetNeedsLowering = true;
738 // Cannot encode zero register as base.
739 if (Addr.isRegBase() && Addr.getOffsetReg() && !Addr.getReg())
740 RegisterOffsetNeedsLowering = true;
742 // If this is a stack pointer and the offset needs to be simplified then put
743 // the alloca address into a register, set the base type back to register and
744 // continue. This should almost never happen.
745 if (ImmediateOffsetNeedsLowering && Addr.isFIBase()) {
746 unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass);
747 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
749 .addFrameIndex(Addr.getFI())
752 Addr.setKind(Address::RegBase);
753 Addr.setReg(ResultReg);
756 if (RegisterOffsetNeedsLowering) {
757 unsigned ResultReg = 0;
759 if (Addr.getExtendType() == AArch64_AM::SXTW ||
760 Addr.getExtendType() == AArch64_AM::UXTW )
761 ResultReg = emitAddSub_rx(/*UseAdd=*/true, MVT::i64, Addr.getReg(),
762 /*TODO:IsKill=*/false, Addr.getOffsetReg(),
763 /*TODO:IsKill=*/false, Addr.getExtendType(),
766 ResultReg = emitAddSub_rs(/*UseAdd=*/true, MVT::i64, Addr.getReg(),
767 /*TODO:IsKill=*/false, Addr.getOffsetReg(),
768 /*TODO:IsKill=*/false, AArch64_AM::LSL,
771 if (Addr.getExtendType() == AArch64_AM::UXTW)
772 ResultReg = emitLSL_ri(MVT::i64, MVT::i32, Addr.getOffsetReg(),
773 /*Op0IsKill=*/false, Addr.getShift(),
775 else if (Addr.getExtendType() == AArch64_AM::SXTW)
776 ResultReg = emitLSL_ri(MVT::i64, MVT::i32, Addr.getOffsetReg(),
777 /*Op0IsKill=*/false, Addr.getShift(),
780 ResultReg = emitLSL_ri(MVT::i64, MVT::i64, Addr.getOffsetReg(),
781 /*Op0IsKill=*/false, Addr.getShift());
786 Addr.setReg(ResultReg);
787 Addr.setOffsetReg(0);
789 Addr.setExtendType(AArch64_AM::InvalidShiftExtend);
792 // Since the offset is too large for the load/store instruction get the
793 // reg+offset into a register.
794 if (ImmediateOffsetNeedsLowering) {
795 unsigned ResultReg = 0;
797 ResultReg = fastEmit_ri_(MVT::i64, ISD::ADD, Addr.getReg(),
798 /*IsKill=*/false, Offset, MVT::i64);
800 ResultReg = fastEmit_i(MVT::i64, MVT::i64, ISD::Constant, Offset);
804 Addr.setReg(ResultReg);
810 void AArch64FastISel::AddLoadStoreOperands(Address &Addr,
811 const MachineInstrBuilder &MIB,
813 unsigned ScaleFactor,
814 MachineMemOperand *MMO) {
815 int64_t Offset = Addr.getOffset() / ScaleFactor;
816 // Frame base works a bit differently. Handle it separately.
817 if (Addr.isFIBase()) {
818 int FI = Addr.getFI();
819 // FIXME: We shouldn't be using getObjectSize/getObjectAlignment. The size
820 // and alignment should be based on the VT.
821 MMO = FuncInfo.MF->getMachineMemOperand(
822 MachinePointerInfo::getFixedStack(FI, Offset), Flags,
823 MFI.getObjectSize(FI), MFI.getObjectAlignment(FI));
824 // Now add the rest of the operands.
825 MIB.addFrameIndex(FI).addImm(Offset);
827 assert(Addr.isRegBase() && "Unexpected address kind.");
828 const MCInstrDesc &II = MIB->getDesc();
829 unsigned Idx = (Flags & MachineMemOperand::MOStore) ? 1 : 0;
831 constrainOperandRegClass(II, Addr.getReg(), II.getNumDefs()+Idx));
833 constrainOperandRegClass(II, Addr.getOffsetReg(), II.getNumDefs()+Idx+1));
834 if (Addr.getOffsetReg()) {
835 assert(Addr.getOffset() == 0 && "Unexpected offset");
836 bool IsSigned = Addr.getExtendType() == AArch64_AM::SXTW ||
837 Addr.getExtendType() == AArch64_AM::SXTX;
838 MIB.addReg(Addr.getReg());
839 MIB.addReg(Addr.getOffsetReg());
840 MIB.addImm(IsSigned);
841 MIB.addImm(Addr.getShift() != 0);
843 MIB.addReg(Addr.getReg());
849 MIB.addMemOperand(MMO);
852 unsigned AArch64FastISel::emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS,
853 const Value *RHS, bool SetFlags,
854 bool WantResult, bool IsZExt) {
855 AArch64_AM::ShiftExtendType ExtendType = AArch64_AM::InvalidShiftExtend;
856 bool NeedExtend = false;
857 switch (RetVT.SimpleTy) {
865 ExtendType = IsZExt ? AArch64_AM::UXTB : AArch64_AM::SXTB;
869 ExtendType = IsZExt ? AArch64_AM::UXTH : AArch64_AM::SXTH;
871 case MVT::i32: // fall-through
876 RetVT.SimpleTy = std::max(RetVT.SimpleTy, MVT::i32);
878 // Canonicalize immediates to the RHS first.
879 if (UseAdd && isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS))
882 // Canonicalize shift immediate to the RHS.
883 if (UseAdd && isValueAvailable(LHS))
884 if (const auto *SI = dyn_cast<BinaryOperator>(LHS))
885 if (isa<ConstantInt>(SI->getOperand(1)))
886 if (SI->getOpcode() == Instruction::Shl ||
887 SI->getOpcode() == Instruction::LShr ||
888 SI->getOpcode() == Instruction::AShr )
891 unsigned LHSReg = getRegForValue(LHS);
894 bool LHSIsKill = hasTrivialKill(LHS);
897 LHSReg = EmitIntExt(SrcVT, LHSReg, RetVT, IsZExt);
899 unsigned ResultReg = 0;
900 if (const auto *C = dyn_cast<ConstantInt>(RHS)) {
901 uint64_t Imm = IsZExt ? C->getZExtValue() : C->getSExtValue();
903 ResultReg = emitAddSub_ri(!UseAdd, RetVT, LHSReg, LHSIsKill, -Imm,
904 SetFlags, WantResult);
906 ResultReg = emitAddSub_ri(UseAdd, RetVT, LHSReg, LHSIsKill, Imm, SetFlags,
912 // Only extend the RHS within the instruction if there is a valid extend type.
913 if (ExtendType != AArch64_AM::InvalidShiftExtend && isValueAvailable(RHS)) {
914 if (const auto *SI = dyn_cast<BinaryOperator>(RHS))
915 if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1)))
916 if ((SI->getOpcode() == Instruction::Shl) && (C->getZExtValue() < 4)) {
917 unsigned RHSReg = getRegForValue(SI->getOperand(0));
920 bool RHSIsKill = hasTrivialKill(SI->getOperand(0));
921 return emitAddSub_rx(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg,
922 RHSIsKill, ExtendType, C->getZExtValue(),
923 SetFlags, WantResult);
925 unsigned RHSReg = getRegForValue(RHS);
928 bool RHSIsKill = hasTrivialKill(RHS);
929 return emitAddSub_rx(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
930 ExtendType, 0, SetFlags, WantResult);
933 // Check if the shift can be folded into the instruction.
934 if (isValueAvailable(RHS))
935 if (const auto *SI = dyn_cast<BinaryOperator>(RHS)) {
936 if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1))) {
937 AArch64_AM::ShiftExtendType ShiftType = AArch64_AM::InvalidShiftExtend;
938 switch (SI->getOpcode()) {
940 case Instruction::Shl: ShiftType = AArch64_AM::LSL; break;
941 case Instruction::LShr: ShiftType = AArch64_AM::LSR; break;
942 case Instruction::AShr: ShiftType = AArch64_AM::ASR; break;
944 uint64_t ShiftVal = C->getZExtValue();
945 if (ShiftType != AArch64_AM::InvalidShiftExtend) {
946 unsigned RHSReg = getRegForValue(SI->getOperand(0));
949 bool RHSIsKill = hasTrivialKill(SI->getOperand(0));
950 return emitAddSub_rs(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg,
951 RHSIsKill, ShiftType, ShiftVal, SetFlags,
957 unsigned RHSReg = getRegForValue(RHS);
960 bool RHSIsKill = hasTrivialKill(RHS);
963 RHSReg = EmitIntExt(SrcVT, RHSReg, RetVT, IsZExt);
965 return emitAddSub_rr(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
966 SetFlags, WantResult);
969 unsigned AArch64FastISel::emitAddSub_rr(bool UseAdd, MVT RetVT, unsigned LHSReg,
970 bool LHSIsKill, unsigned RHSReg,
971 bool RHSIsKill, bool SetFlags,
973 assert(LHSReg && RHSReg && "Invalid register number.");
975 if (RetVT != MVT::i32 && RetVT != MVT::i64)
978 static const unsigned OpcTable[2][2][2] = {
979 { { AArch64::SUBWrr, AArch64::SUBXrr },
980 { AArch64::ADDWrr, AArch64::ADDXrr } },
981 { { AArch64::SUBSWrr, AArch64::SUBSXrr },
982 { AArch64::ADDSWrr, AArch64::ADDSXrr } }
984 bool Is64Bit = RetVT == MVT::i64;
985 unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
986 const TargetRegisterClass *RC =
987 Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
990 ResultReg = createResultReg(RC);
992 ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
994 const MCInstrDesc &II = TII.get(Opc);
995 LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
996 RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1);
997 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
998 .addReg(LHSReg, getKillRegState(LHSIsKill))
999 .addReg(RHSReg, getKillRegState(RHSIsKill));
1003 unsigned AArch64FastISel::emitAddSub_ri(bool UseAdd, MVT RetVT, unsigned LHSReg,
1004 bool LHSIsKill, uint64_t Imm,
1005 bool SetFlags, bool WantResult) {
1006 assert(LHSReg && "Invalid register number.");
1008 if (RetVT != MVT::i32 && RetVT != MVT::i64)
1012 if (isUInt<12>(Imm))
1014 else if ((Imm & 0xfff000) == Imm) {
1020 static const unsigned OpcTable[2][2][2] = {
1021 { { AArch64::SUBWri, AArch64::SUBXri },
1022 { AArch64::ADDWri, AArch64::ADDXri } },
1023 { { AArch64::SUBSWri, AArch64::SUBSXri },
1024 { AArch64::ADDSWri, AArch64::ADDSXri } }
1026 bool Is64Bit = RetVT == MVT::i64;
1027 unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
1028 const TargetRegisterClass *RC;
1030 RC = Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
1032 RC = Is64Bit ? &AArch64::GPR64spRegClass : &AArch64::GPR32spRegClass;
1035 ResultReg = createResultReg(RC);
1037 ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
1039 const MCInstrDesc &II = TII.get(Opc);
1040 LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
1041 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
1042 .addReg(LHSReg, getKillRegState(LHSIsKill))
1044 .addImm(getShifterImm(AArch64_AM::LSL, ShiftImm));
1048 unsigned AArch64FastISel::emitAddSub_rs(bool UseAdd, MVT RetVT, unsigned LHSReg,
1049 bool LHSIsKill, unsigned RHSReg,
1051 AArch64_AM::ShiftExtendType ShiftType,
1052 uint64_t ShiftImm, bool SetFlags,
1054 assert(LHSReg && RHSReg && "Invalid register number.");
1056 if (RetVT != MVT::i32 && RetVT != MVT::i64)
1059 static const unsigned OpcTable[2][2][2] = {
1060 { { AArch64::SUBWrs, AArch64::SUBXrs },
1061 { AArch64::ADDWrs, AArch64::ADDXrs } },
1062 { { AArch64::SUBSWrs, AArch64::SUBSXrs },
1063 { AArch64::ADDSWrs, AArch64::ADDSXrs } }
1065 bool Is64Bit = RetVT == MVT::i64;
1066 unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
1067 const TargetRegisterClass *RC =
1068 Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
1071 ResultReg = createResultReg(RC);
1073 ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
1075 const MCInstrDesc &II = TII.get(Opc);
1076 LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
1077 RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1);
1078 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
1079 .addReg(LHSReg, getKillRegState(LHSIsKill))
1080 .addReg(RHSReg, getKillRegState(RHSIsKill))
1081 .addImm(getShifterImm(ShiftType, ShiftImm));
1085 unsigned AArch64FastISel::emitAddSub_rx(bool UseAdd, MVT RetVT, unsigned LHSReg,
1086 bool LHSIsKill, unsigned RHSReg,
1088 AArch64_AM::ShiftExtendType ExtType,
1089 uint64_t ShiftImm, bool SetFlags,
1091 assert(LHSReg && RHSReg && "Invalid register number.");
1093 if (RetVT != MVT::i32 && RetVT != MVT::i64)
1096 static const unsigned OpcTable[2][2][2] = {
1097 { { AArch64::SUBWrx, AArch64::SUBXrx },
1098 { AArch64::ADDWrx, AArch64::ADDXrx } },
1099 { { AArch64::SUBSWrx, AArch64::SUBSXrx },
1100 { AArch64::ADDSWrx, AArch64::ADDSXrx } }
1102 bool Is64Bit = RetVT == MVT::i64;
1103 unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
1104 const TargetRegisterClass *RC = nullptr;
1106 RC = Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
1108 RC = Is64Bit ? &AArch64::GPR64spRegClass : &AArch64::GPR32spRegClass;
1111 ResultReg = createResultReg(RC);
1113 ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
1115 const MCInstrDesc &II = TII.get(Opc);
1116 LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
1117 RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1);
1118 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
1119 .addReg(LHSReg, getKillRegState(LHSIsKill))
1120 .addReg(RHSReg, getKillRegState(RHSIsKill))
1121 .addImm(getArithExtendImm(ExtType, ShiftImm));
1125 bool AArch64FastISel::emitCmp(const Value *LHS, const Value *RHS, bool IsZExt) {
1126 Type *Ty = LHS->getType();
1127 EVT EVT = TLI.getValueType(Ty, true);
1128 if (!EVT.isSimple())
1130 MVT VT = EVT.getSimpleVT();
1132 switch (VT.SimpleTy) {
1140 return emitICmp(VT, LHS, RHS, IsZExt);
1143 return emitFCmp(VT, LHS, RHS);
1147 bool AArch64FastISel::emitICmp(MVT RetVT, const Value *LHS, const Value *RHS,
1149 return emitSub(RetVT, LHS, RHS, /*SetFlags=*/true, /*WantResult=*/false,
1153 bool AArch64FastISel::emitICmp_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
1155 return emitAddSub_ri(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, Imm,
1156 /*SetFlags=*/true, /*WantResult=*/false) != 0;
1159 bool AArch64FastISel::emitFCmp(MVT RetVT, const Value *LHS, const Value *RHS) {
1160 if (RetVT != MVT::f32 && RetVT != MVT::f64)
1163 // Check to see if the 2nd operand is a constant that we can encode directly
1165 bool UseImm = false;
1166 if (const auto *CFP = dyn_cast<ConstantFP>(RHS))
1167 if (CFP->isZero() && !CFP->isNegative())
1170 unsigned LHSReg = getRegForValue(LHS);
1173 bool LHSIsKill = hasTrivialKill(LHS);
1176 unsigned Opc = (RetVT == MVT::f64) ? AArch64::FCMPDri : AArch64::FCMPSri;
1177 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc))
1178 .addReg(LHSReg, getKillRegState(LHSIsKill));
1182 unsigned RHSReg = getRegForValue(RHS);
1185 bool RHSIsKill = hasTrivialKill(RHS);
1187 unsigned Opc = (RetVT == MVT::f64) ? AArch64::FCMPDrr : AArch64::FCMPSrr;
1188 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc))
1189 .addReg(LHSReg, getKillRegState(LHSIsKill))
1190 .addReg(RHSReg, getKillRegState(RHSIsKill));
1194 unsigned AArch64FastISel::emitAdd(MVT RetVT, const Value *LHS, const Value *RHS,
1195 bool SetFlags, bool WantResult, bool IsZExt) {
1196 return emitAddSub(/*UseAdd=*/true, RetVT, LHS, RHS, SetFlags, WantResult,
1200 unsigned AArch64FastISel::emitSub(MVT RetVT, const Value *LHS, const Value *RHS,
1201 bool SetFlags, bool WantResult, bool IsZExt) {
1202 return emitAddSub(/*UseAdd=*/false, RetVT, LHS, RHS, SetFlags, WantResult,
1206 unsigned AArch64FastISel::emitSubs_rr(MVT RetVT, unsigned LHSReg,
1207 bool LHSIsKill, unsigned RHSReg,
1208 bool RHSIsKill, bool WantResult) {
1209 return emitAddSub_rr(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, RHSReg,
1210 RHSIsKill, /*SetFlags=*/true, WantResult);
1213 unsigned AArch64FastISel::emitSubs_rs(MVT RetVT, unsigned LHSReg,
1214 bool LHSIsKill, unsigned RHSReg,
1216 AArch64_AM::ShiftExtendType ShiftType,
1217 uint64_t ShiftImm, bool WantResult) {
1218 return emitAddSub_rs(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, RHSReg,
1219 RHSIsKill, ShiftType, ShiftImm, /*SetFlags=*/true,
1223 unsigned AArch64FastISel::emitLogicalOp(unsigned ISDOpc, MVT RetVT,
1224 const Value *LHS, const Value *RHS) {
1225 // Canonicalize immediates to the RHS first.
1226 if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS))
1227 std::swap(LHS, RHS);
1229 // Canonicalize shift immediate to the RHS.
1230 if (isValueAvailable(LHS))
1231 if (const auto *SI = dyn_cast<BinaryOperator>(LHS))
1232 if (isa<ConstantInt>(SI->getOperand(1)))
1233 if (SI->getOpcode() == Instruction::Shl)
1234 std::swap(LHS, RHS);
1236 unsigned LHSReg = getRegForValue(LHS);
1239 bool LHSIsKill = hasTrivialKill(LHS);
1241 unsigned ResultReg = 0;
1242 if (const auto *C = dyn_cast<ConstantInt>(RHS)) {
1243 uint64_t Imm = C->getZExtValue();
1244 ResultReg = emitLogicalOp_ri(ISDOpc, RetVT, LHSReg, LHSIsKill, Imm);
1249 // Check if the shift can be folded into the instruction.
1250 if (isValueAvailable(RHS))
1251 if (const auto *SI = dyn_cast<BinaryOperator>(RHS))
1252 if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1)))
1253 if (SI->getOpcode() == Instruction::Shl) {
1254 uint64_t ShiftVal = C->getZExtValue();
1255 unsigned RHSReg = getRegForValue(SI->getOperand(0));
1258 bool RHSIsKill = hasTrivialKill(SI->getOperand(0));
1259 return emitLogicalOp_rs(ISDOpc, RetVT, LHSReg, LHSIsKill, RHSReg,
1260 RHSIsKill, ShiftVal);
1263 unsigned RHSReg = getRegForValue(RHS);
1266 bool RHSIsKill = hasTrivialKill(RHS);
1268 MVT VT = std::max(MVT::i32, RetVT.SimpleTy);
1269 ResultReg = fastEmit_rr(VT, VT, ISDOpc, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
1270 if (RetVT >= MVT::i8 && RetVT <= MVT::i16) {
1271 uint64_t Mask = (RetVT == MVT::i8) ? 0xff : 0xffff;
1272 ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
1277 unsigned AArch64FastISel::emitLogicalOp_ri(unsigned ISDOpc, MVT RetVT,
1278 unsigned LHSReg, bool LHSIsKill,
1280 assert((ISD::AND + 1 == ISD::OR) && (ISD::AND + 2 == ISD::XOR) &&
1281 "ISD nodes are not consecutive!");
1282 static const unsigned OpcTable[3][2] = {
1283 { AArch64::ANDWri, AArch64::ANDXri },
1284 { AArch64::ORRWri, AArch64::ORRXri },
1285 { AArch64::EORWri, AArch64::EORXri }
1287 const TargetRegisterClass *RC;
1290 switch (RetVT.SimpleTy) {
1297 unsigned Idx = ISDOpc - ISD::AND;
1298 Opc = OpcTable[Idx][0];
1299 RC = &AArch64::GPR32spRegClass;
1304 Opc = OpcTable[ISDOpc - ISD::AND][1];
1305 RC = &AArch64::GPR64spRegClass;
1310 if (!AArch64_AM::isLogicalImmediate(Imm, RegSize))
1313 unsigned ResultReg =
1314 fastEmitInst_ri(Opc, RC, LHSReg, LHSIsKill,
1315 AArch64_AM::encodeLogicalImmediate(Imm, RegSize));
1316 if (RetVT >= MVT::i8 && RetVT <= MVT::i16 && ISDOpc != ISD::AND) {
1317 uint64_t Mask = (RetVT == MVT::i8) ? 0xff : 0xffff;
1318 ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
1323 unsigned AArch64FastISel::emitLogicalOp_rs(unsigned ISDOpc, MVT RetVT,
1324 unsigned LHSReg, bool LHSIsKill,
1325 unsigned RHSReg, bool RHSIsKill,
1326 uint64_t ShiftImm) {
1327 assert((ISD::AND + 1 == ISD::OR) && (ISD::AND + 2 == ISD::XOR) &&
1328 "ISD nodes are not consecutive!");
1329 static const unsigned OpcTable[3][2] = {
1330 { AArch64::ANDWrs, AArch64::ANDXrs },
1331 { AArch64::ORRWrs, AArch64::ORRXrs },
1332 { AArch64::EORWrs, AArch64::EORXrs }
1334 const TargetRegisterClass *RC;
1336 switch (RetVT.SimpleTy) {
1343 Opc = OpcTable[ISDOpc - ISD::AND][0];
1344 RC = &AArch64::GPR32RegClass;
1347 Opc = OpcTable[ISDOpc - ISD::AND][1];
1348 RC = &AArch64::GPR64RegClass;
1351 unsigned ResultReg =
1352 fastEmitInst_rri(Opc, RC, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
1353 AArch64_AM::getShifterImm(AArch64_AM::LSL, ShiftImm));
1354 if (RetVT >= MVT::i8 && RetVT <= MVT::i16) {
1355 uint64_t Mask = (RetVT == MVT::i8) ? 0xff : 0xffff;
1356 ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
1361 unsigned AArch64FastISel::emitAnd_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
1363 return emitLogicalOp_ri(ISD::AND, RetVT, LHSReg, LHSIsKill, Imm);
1366 bool AArch64FastISel::EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
1367 MachineMemOperand *MMO) {
1368 // Simplify this down to something we can handle.
1369 if (!SimplifyAddress(Addr, VT))
1372 unsigned ScaleFactor;
1373 switch (VT.SimpleTy) {
1374 default: llvm_unreachable("Unexpected value type.");
1375 case MVT::i1: // fall-through
1376 case MVT::i8: ScaleFactor = 1; break;
1377 case MVT::i16: ScaleFactor = 2; break;
1378 case MVT::i32: // fall-through
1379 case MVT::f32: ScaleFactor = 4; break;
1380 case MVT::i64: // fall-through
1381 case MVT::f64: ScaleFactor = 8; break;
1384 // Negative offsets require unscaled, 9-bit, signed immediate offsets.
1385 // Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
1386 bool UseScaled = true;
1387 if ((Addr.getOffset() < 0) || (Addr.getOffset() & (ScaleFactor - 1))) {
1392 static const unsigned OpcTable[4][6] = {
1393 { AArch64::LDURBBi, AArch64::LDURHHi, AArch64::LDURWi, AArch64::LDURXi,
1394 AArch64::LDURSi, AArch64::LDURDi },
1395 { AArch64::LDRBBui, AArch64::LDRHHui, AArch64::LDRWui, AArch64::LDRXui,
1396 AArch64::LDRSui, AArch64::LDRDui },
1397 { AArch64::LDRBBroX, AArch64::LDRHHroX, AArch64::LDRWroX, AArch64::LDRXroX,
1398 AArch64::LDRSroX, AArch64::LDRDroX },
1399 { AArch64::LDRBBroW, AArch64::LDRHHroW, AArch64::LDRWroW, AArch64::LDRXroW,
1400 AArch64::LDRSroW, AArch64::LDRDroW }
1404 const TargetRegisterClass *RC;
1405 bool VTIsi1 = false;
1406 bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() &&
1407 Addr.getOffsetReg();
1408 unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0;
1409 if (Addr.getExtendType() == AArch64_AM::UXTW ||
1410 Addr.getExtendType() == AArch64_AM::SXTW)
1413 switch (VT.SimpleTy) {
1414 default: llvm_unreachable("Unexpected value type.");
1415 case MVT::i1: VTIsi1 = true; // Intentional fall-through.
1416 case MVT::i8: Opc = OpcTable[Idx][0]; RC = &AArch64::GPR32RegClass; break;
1417 case MVT::i16: Opc = OpcTable[Idx][1]; RC = &AArch64::GPR32RegClass; break;
1418 case MVT::i32: Opc = OpcTable[Idx][2]; RC = &AArch64::GPR32RegClass; break;
1419 case MVT::i64: Opc = OpcTable[Idx][3]; RC = &AArch64::GPR64RegClass; break;
1420 case MVT::f32: Opc = OpcTable[Idx][4]; RC = &AArch64::FPR32RegClass; break;
1421 case MVT::f64: Opc = OpcTable[Idx][5]; RC = &AArch64::FPR64RegClass; break;
1424 // Create the base instruction, then add the operands.
1425 ResultReg = createResultReg(RC);
1426 MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
1427 TII.get(Opc), ResultReg);
1428 AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOLoad, ScaleFactor, MMO);
1430 // Loading an i1 requires special handling.
1432 unsigned ANDReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, 1);
1433 assert(ANDReg && "Unexpected AND instruction emission failure.");
1439 bool AArch64FastISel::selectAddSub(const Instruction *I) {
1441 if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true))
1445 return selectOperator(I, I->getOpcode());
1448 switch (I->getOpcode()) {
1450 llvm_unreachable("Unexpected instruction.");
1451 case Instruction::Add:
1452 ResultReg = emitAdd(VT, I->getOperand(0), I->getOperand(1));
1454 case Instruction::Sub:
1455 ResultReg = emitSub(VT, I->getOperand(0), I->getOperand(1));
1461 updateValueMap(I, ResultReg);
1465 bool AArch64FastISel::selectLogicalOp(const Instruction *I) {
1467 if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true))
1471 return selectOperator(I, I->getOpcode());
1474 switch (I->getOpcode()) {
1476 llvm_unreachable("Unexpected instruction.");
1477 case Instruction::And:
1478 ResultReg = emitLogicalOp(ISD::AND, VT, I->getOperand(0), I->getOperand(1));
1480 case Instruction::Or:
1481 ResultReg = emitLogicalOp(ISD::OR, VT, I->getOperand(0), I->getOperand(1));
1483 case Instruction::Xor:
1484 ResultReg = emitLogicalOp(ISD::XOR, VT, I->getOperand(0), I->getOperand(1));
1490 updateValueMap(I, ResultReg);
1494 bool AArch64FastISel::SelectLoad(const Instruction *I) {
1496 // Verify we have a legal type before going any further. Currently, we handle
1497 // simple types that will directly fit in a register (i32/f32/i64/f64) or
1498 // those that can be sign or zero-extended to a basic operation (i1/i8/i16).
1499 if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true) ||
1500 cast<LoadInst>(I)->isAtomic())
1503 // See if we can handle this address.
1505 if (!ComputeAddress(I->getOperand(0), Addr, I->getType()))
1509 if (!EmitLoad(VT, ResultReg, Addr, createMachineMemOperandFor(I)))
1512 updateValueMap(I, ResultReg);
1516 bool AArch64FastISel::EmitStore(MVT VT, unsigned SrcReg, Address Addr,
1517 MachineMemOperand *MMO) {
1518 // Simplify this down to something we can handle.
1519 if (!SimplifyAddress(Addr, VT))
1522 unsigned ScaleFactor;
1523 switch (VT.SimpleTy) {
1524 default: llvm_unreachable("Unexpected value type.");
1525 case MVT::i1: // fall-through
1526 case MVT::i8: ScaleFactor = 1; break;
1527 case MVT::i16: ScaleFactor = 2; break;
1528 case MVT::i32: // fall-through
1529 case MVT::f32: ScaleFactor = 4; break;
1530 case MVT::i64: // fall-through
1531 case MVT::f64: ScaleFactor = 8; break;
1534 // Negative offsets require unscaled, 9-bit, signed immediate offsets.
1535 // Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
1536 bool UseScaled = true;
1537 if ((Addr.getOffset() < 0) || (Addr.getOffset() & (ScaleFactor - 1))) {
1543 static const unsigned OpcTable[4][6] = {
1544 { AArch64::STURBBi, AArch64::STURHHi, AArch64::STURWi, AArch64::STURXi,
1545 AArch64::STURSi, AArch64::STURDi },
1546 { AArch64::STRBBui, AArch64::STRHHui, AArch64::STRWui, AArch64::STRXui,
1547 AArch64::STRSui, AArch64::STRDui },
1548 { AArch64::STRBBroX, AArch64::STRHHroX, AArch64::STRWroX, AArch64::STRXroX,
1549 AArch64::STRSroX, AArch64::STRDroX },
1550 { AArch64::STRBBroW, AArch64::STRHHroW, AArch64::STRWroW, AArch64::STRXroW,
1551 AArch64::STRSroW, AArch64::STRDroW }
1556 bool VTIsi1 = false;
1557 bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() &&
1558 Addr.getOffsetReg();
1559 unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0;
1560 if (Addr.getExtendType() == AArch64_AM::UXTW ||
1561 Addr.getExtendType() == AArch64_AM::SXTW)
1564 switch (VT.SimpleTy) {
1565 default: llvm_unreachable("Unexpected value type.");
1566 case MVT::i1: VTIsi1 = true;
1567 case MVT::i8: Opc = OpcTable[Idx][0]; break;
1568 case MVT::i16: Opc = OpcTable[Idx][1]; break;
1569 case MVT::i32: Opc = OpcTable[Idx][2]; break;
1570 case MVT::i64: Opc = OpcTable[Idx][3]; break;
1571 case MVT::f32: Opc = OpcTable[Idx][4]; break;
1572 case MVT::f64: Opc = OpcTable[Idx][5]; break;
1575 // Storing an i1 requires special handling.
1576 if (VTIsi1 && SrcReg != AArch64::WZR) {
1577 unsigned ANDReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1);
1578 assert(ANDReg && "Unexpected AND instruction emission failure.");
1581 // Create the base instruction, then add the operands.
1582 const MCInstrDesc &II = TII.get(Opc);
1583 SrcReg = constrainOperandRegClass(II, SrcReg, II.getNumDefs());
1584 MachineInstrBuilder MIB =
1585 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(SrcReg);
1586 AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOStore, ScaleFactor, MMO);
1591 bool AArch64FastISel::SelectStore(const Instruction *I) {
1593 const Value *Op0 = I->getOperand(0);
1594 // Verify we have a legal type before going any further. Currently, we handle
1595 // simple types that will directly fit in a register (i32/f32/i64/f64) or
1596 // those that can be sign or zero-extended to a basic operation (i1/i8/i16).
1597 if (!isTypeSupported(Op0->getType(), VT, /*IsVectorAllowed=*/true) ||
1598 cast<StoreInst>(I)->isAtomic())
1601 // Get the value to be stored into a register. Use the zero register directly
1602 // when possible to avoid an unnecessary copy and a wasted register.
1603 unsigned SrcReg = 0;
1604 if (const auto *CI = dyn_cast<ConstantInt>(Op0)) {
1606 SrcReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
1607 } else if (const auto *CF = dyn_cast<ConstantFP>(Op0)) {
1608 if (CF->isZero() && !CF->isNegative()) {
1609 VT = MVT::getIntegerVT(VT.getSizeInBits());
1610 SrcReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
1615 SrcReg = getRegForValue(Op0);
1620 // See if we can handle this address.
1622 if (!ComputeAddress(I->getOperand(1), Addr, I->getOperand(0)->getType()))
1625 if (!EmitStore(VT, SrcReg, Addr, createMachineMemOperandFor(I)))
1630 static AArch64CC::CondCode getCompareCC(CmpInst::Predicate Pred) {
1632 case CmpInst::FCMP_ONE:
1633 case CmpInst::FCMP_UEQ:
1635 // AL is our "false" for now. The other two need more compares.
1636 return AArch64CC::AL;
1637 case CmpInst::ICMP_EQ:
1638 case CmpInst::FCMP_OEQ:
1639 return AArch64CC::EQ;
1640 case CmpInst::ICMP_SGT:
1641 case CmpInst::FCMP_OGT:
1642 return AArch64CC::GT;
1643 case CmpInst::ICMP_SGE:
1644 case CmpInst::FCMP_OGE:
1645 return AArch64CC::GE;
1646 case CmpInst::ICMP_UGT:
1647 case CmpInst::FCMP_UGT:
1648 return AArch64CC::HI;
1649 case CmpInst::FCMP_OLT:
1650 return AArch64CC::MI;
1651 case CmpInst::ICMP_ULE:
1652 case CmpInst::FCMP_OLE:
1653 return AArch64CC::LS;
1654 case CmpInst::FCMP_ORD:
1655 return AArch64CC::VC;
1656 case CmpInst::FCMP_UNO:
1657 return AArch64CC::VS;
1658 case CmpInst::FCMP_UGE:
1659 return AArch64CC::PL;
1660 case CmpInst::ICMP_SLT:
1661 case CmpInst::FCMP_ULT:
1662 return AArch64CC::LT;
1663 case CmpInst::ICMP_SLE:
1664 case CmpInst::FCMP_ULE:
1665 return AArch64CC::LE;
1666 case CmpInst::FCMP_UNE:
1667 case CmpInst::ICMP_NE:
1668 return AArch64CC::NE;
1669 case CmpInst::ICMP_UGE:
1670 return AArch64CC::HS;
1671 case CmpInst::ICMP_ULT:
1672 return AArch64CC::LO;
1676 bool AArch64FastISel::SelectBranch(const Instruction *I) {
1677 const BranchInst *BI = cast<BranchInst>(I);
1678 if (BI->isUnconditional()) {
1679 MachineBasicBlock *MSucc = FuncInfo.MBBMap[BI->getSuccessor(0)];
1680 fastEmitBranch(MSucc, BI->getDebugLoc());
1684 MachineBasicBlock *TBB = FuncInfo.MBBMap[BI->getSuccessor(0)];
1685 MachineBasicBlock *FBB = FuncInfo.MBBMap[BI->getSuccessor(1)];
1687 AArch64CC::CondCode CC = AArch64CC::NE;
1688 if (const CmpInst *CI = dyn_cast<CmpInst>(BI->getCondition())) {
1689 if (CI->hasOneUse() && (CI->getParent() == I->getParent())) {
1690 // We may not handle every CC for now.
1691 CC = getCompareCC(CI->getPredicate());
1692 if (CC == AArch64CC::AL)
1696 if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
1700 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc))
1704 // Obtain the branch weight and add the TrueBB to the successor list.
1705 uint32_t BranchWeight = 0;
1707 BranchWeight = FuncInfo.BPI->getEdgeWeight(BI->getParent(),
1708 TBB->getBasicBlock());
1709 FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
1711 fastEmitBranch(FBB, DbgLoc);
1714 } else if (TruncInst *TI = dyn_cast<TruncInst>(BI->getCondition())) {
1716 if (TI->hasOneUse() && TI->getParent() == I->getParent() &&
1717 (isTypeSupported(TI->getOperand(0)->getType(), SrcVT))) {
1718 unsigned CondReg = getRegForValue(TI->getOperand(0));
1721 bool CondIsKill = hasTrivialKill(TI->getOperand(0));
1723 // Issue an extract_subreg to get the lower 32-bits.
1724 if (SrcVT == MVT::i64) {
1725 CondReg = fastEmitInst_extractsubreg(MVT::i32, CondReg, CondIsKill,
1730 unsigned ANDReg = emitAnd_ri(MVT::i32, CondReg, CondIsKill, 1);
1731 assert(ANDReg && "Unexpected AND instruction emission failure.");
1732 emitICmp_ri(MVT::i32, ANDReg, /*IsKill=*/true, 0);
1734 if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
1735 std::swap(TBB, FBB);
1738 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc))
1742 // Obtain the branch weight and add the TrueBB to the successor list.
1743 uint32_t BranchWeight = 0;
1745 BranchWeight = FuncInfo.BPI->getEdgeWeight(BI->getParent(),
1746 TBB->getBasicBlock());
1747 FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
1749 fastEmitBranch(FBB, DbgLoc);
1752 } else if (const ConstantInt *CI =
1753 dyn_cast<ConstantInt>(BI->getCondition())) {
1754 uint64_t Imm = CI->getZExtValue();
1755 MachineBasicBlock *Target = (Imm == 0) ? FBB : TBB;
1756 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::B))
1759 // Obtain the branch weight and add the target to the successor list.
1760 uint32_t BranchWeight = 0;
1762 BranchWeight = FuncInfo.BPI->getEdgeWeight(BI->getParent(),
1763 Target->getBasicBlock());
1764 FuncInfo.MBB->addSuccessor(Target, BranchWeight);
1766 } else if (foldXALUIntrinsic(CC, I, BI->getCondition())) {
1767 // Fake request the condition, otherwise the intrinsic might be completely
1769 unsigned CondReg = getRegForValue(BI->getCondition());
1774 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc))
1778 // Obtain the branch weight and add the TrueBB to the successor list.
1779 uint32_t BranchWeight = 0;
1781 BranchWeight = FuncInfo.BPI->getEdgeWeight(BI->getParent(),
1782 TBB->getBasicBlock());
1783 FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
1785 fastEmitBranch(FBB, DbgLoc);
1789 unsigned CondReg = getRegForValue(BI->getCondition());
1792 bool CondRegIsKill = hasTrivialKill(BI->getCondition());
1794 // We've been divorced from our compare! Our block was split, and
1795 // now our compare lives in a predecessor block. We musn't
1796 // re-compare here, as the children of the compare aren't guaranteed
1797 // live across the block boundary (we *could* check for this).
1798 // Regardless, the compare has been done in the predecessor block,
1799 // and it left a value for us in a virtual register. Ergo, we test
1800 // the one-bit value left in the virtual register.
1801 emitICmp_ri(MVT::i32, CondReg, CondRegIsKill, 0);
1803 if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
1804 std::swap(TBB, FBB);
1808 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc))
1812 // Obtain the branch weight and add the TrueBB to the successor list.
1813 uint32_t BranchWeight = 0;
1815 BranchWeight = FuncInfo.BPI->getEdgeWeight(BI->getParent(),
1816 TBB->getBasicBlock());
1817 FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
1819 fastEmitBranch(FBB, DbgLoc);
1823 bool AArch64FastISel::SelectIndirectBr(const Instruction *I) {
1824 const IndirectBrInst *BI = cast<IndirectBrInst>(I);
1825 unsigned AddrReg = getRegForValue(BI->getOperand(0));
1829 // Emit the indirect branch.
1830 const MCInstrDesc &II = TII.get(AArch64::BR);
1831 AddrReg = constrainOperandRegClass(II, AddrReg, II.getNumDefs());
1832 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(AddrReg);
1834 // Make sure the CFG is up-to-date.
1835 for (unsigned i = 0, e = BI->getNumSuccessors(); i != e; ++i)
1836 FuncInfo.MBB->addSuccessor(FuncInfo.MBBMap[BI->getSuccessor(i)]);
1841 bool AArch64FastISel::SelectCmp(const Instruction *I) {
1842 const CmpInst *CI = cast<CmpInst>(I);
1844 // Try to optimize or fold the cmp.
1845 CmpInst::Predicate Predicate = optimizeCmpPredicate(CI);
1846 unsigned ResultReg = 0;
1847 switch (Predicate) {
1850 case CmpInst::FCMP_FALSE:
1851 ResultReg = createResultReg(&AArch64::GPR32RegClass);
1852 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
1853 TII.get(TargetOpcode::COPY), ResultReg)
1854 .addReg(AArch64::WZR, getKillRegState(true));
1856 case CmpInst::FCMP_TRUE:
1857 ResultReg = fastEmit_i(MVT::i32, MVT::i32, ISD::Constant, 1);
1862 updateValueMap(I, ResultReg);
1867 if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
1870 ResultReg = createResultReg(&AArch64::GPR32RegClass);
1872 // FCMP_UEQ and FCMP_ONE cannot be checked with a single instruction. These
1873 // condition codes are inverted, because they are used by CSINC.
1874 static unsigned CondCodeTable[2][2] = {
1875 { AArch64CC::NE, AArch64CC::VC },
1876 { AArch64CC::PL, AArch64CC::LE }
1878 unsigned *CondCodes = nullptr;
1879 switch (Predicate) {
1882 case CmpInst::FCMP_UEQ:
1883 CondCodes = &CondCodeTable[0][0];
1885 case CmpInst::FCMP_ONE:
1886 CondCodes = &CondCodeTable[1][0];
1891 unsigned TmpReg1 = createResultReg(&AArch64::GPR32RegClass);
1892 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr),
1894 .addReg(AArch64::WZR, getKillRegState(true))
1895 .addReg(AArch64::WZR, getKillRegState(true))
1896 .addImm(CondCodes[0]);
1897 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr),
1899 .addReg(TmpReg1, getKillRegState(true))
1900 .addReg(AArch64::WZR, getKillRegState(true))
1901 .addImm(CondCodes[1]);
1903 updateValueMap(I, ResultReg);
1907 // Now set a register based on the comparison.
1908 AArch64CC::CondCode CC = getCompareCC(Predicate);
1909 assert((CC != AArch64CC::AL) && "Unexpected condition code.");
1910 AArch64CC::CondCode invertedCC = getInvertedCondCode(CC);
1911 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr),
1913 .addReg(AArch64::WZR, getKillRegState(true))
1914 .addReg(AArch64::WZR, getKillRegState(true))
1915 .addImm(invertedCC);
1917 updateValueMap(I, ResultReg);
1921 bool AArch64FastISel::SelectSelect(const Instruction *I) {
1922 const SelectInst *SI = cast<SelectInst>(I);
1924 EVT DestEVT = TLI.getValueType(SI->getType(), true);
1925 if (!DestEVT.isSimple())
1928 MVT DestVT = DestEVT.getSimpleVT();
1929 if (DestVT != MVT::i32 && DestVT != MVT::i64 && DestVT != MVT::f32 &&
1934 const TargetRegisterClass *RC = nullptr;
1935 switch (DestVT.SimpleTy) {
1936 default: return false;
1938 SelectOpc = AArch64::CSELWr; RC = &AArch64::GPR32RegClass; break;
1940 SelectOpc = AArch64::CSELXr; RC = &AArch64::GPR64RegClass; break;
1942 SelectOpc = AArch64::FCSELSrrr; RC = &AArch64::FPR32RegClass; break;
1944 SelectOpc = AArch64::FCSELDrrr; RC = &AArch64::FPR64RegClass; break;
1947 const Value *Cond = SI->getCondition();
1948 bool NeedTest = true;
1949 AArch64CC::CondCode CC = AArch64CC::NE;
1950 if (foldXALUIntrinsic(CC, I, Cond))
1953 unsigned CondReg = getRegForValue(Cond);
1956 bool CondIsKill = hasTrivialKill(Cond);
1959 unsigned ANDReg = emitAnd_ri(MVT::i32, CondReg, CondIsKill, 1);
1960 assert(ANDReg && "Unexpected AND instruction emission failure.");
1961 emitICmp_ri(MVT::i32, ANDReg, /*IsKill=*/true, 0);
1964 unsigned TrueReg = getRegForValue(SI->getTrueValue());
1965 bool TrueIsKill = hasTrivialKill(SI->getTrueValue());
1967 unsigned FalseReg = getRegForValue(SI->getFalseValue());
1968 bool FalseIsKill = hasTrivialKill(SI->getFalseValue());
1970 if (!TrueReg || !FalseReg)
1973 unsigned ResultReg = fastEmitInst_rri(SelectOpc, RC, TrueReg, TrueIsKill,
1974 FalseReg, FalseIsKill, CC);
1975 updateValueMap(I, ResultReg);
1979 bool AArch64FastISel::SelectFPExt(const Instruction *I) {
1980 Value *V = I->getOperand(0);
1981 if (!I->getType()->isDoubleTy() || !V->getType()->isFloatTy())
1984 unsigned Op = getRegForValue(V);
1988 unsigned ResultReg = createResultReg(&AArch64::FPR64RegClass);
1989 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::FCVTDSr),
1990 ResultReg).addReg(Op);
1991 updateValueMap(I, ResultReg);
1995 bool AArch64FastISel::SelectFPTrunc(const Instruction *I) {
1996 Value *V = I->getOperand(0);
1997 if (!I->getType()->isFloatTy() || !V->getType()->isDoubleTy())
2000 unsigned Op = getRegForValue(V);
2004 unsigned ResultReg = createResultReg(&AArch64::FPR32RegClass);
2005 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::FCVTSDr),
2006 ResultReg).addReg(Op);
2007 updateValueMap(I, ResultReg);
2011 // FPToUI and FPToSI
2012 bool AArch64FastISel::SelectFPToInt(const Instruction *I, bool Signed) {
2014 if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector())
2017 unsigned SrcReg = getRegForValue(I->getOperand(0));
2021 EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType(), true);
2022 if (SrcVT == MVT::f128)
2026 if (SrcVT == MVT::f64) {
2028 Opc = (DestVT == MVT::i32) ? AArch64::FCVTZSUWDr : AArch64::FCVTZSUXDr;
2030 Opc = (DestVT == MVT::i32) ? AArch64::FCVTZUUWDr : AArch64::FCVTZUUXDr;
2033 Opc = (DestVT == MVT::i32) ? AArch64::FCVTZSUWSr : AArch64::FCVTZSUXSr;
2035 Opc = (DestVT == MVT::i32) ? AArch64::FCVTZUUWSr : AArch64::FCVTZUUXSr;
2037 unsigned ResultReg = createResultReg(
2038 DestVT == MVT::i32 ? &AArch64::GPR32RegClass : &AArch64::GPR64RegClass);
2039 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
2041 updateValueMap(I, ResultReg);
2045 bool AArch64FastISel::SelectIntToFP(const Instruction *I, bool Signed) {
2047 if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector())
2049 assert ((DestVT == MVT::f32 || DestVT == MVT::f64) &&
2050 "Unexpected value type.");
2052 unsigned SrcReg = getRegForValue(I->getOperand(0));
2055 bool SrcIsKill = hasTrivialKill(I->getOperand(0));
2057 EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType(), true);
2059 // Handle sign-extension.
2060 if (SrcVT == MVT::i16 || SrcVT == MVT::i8 || SrcVT == MVT::i1) {
2062 EmitIntExt(SrcVT.getSimpleVT(), SrcReg, MVT::i32, /*isZExt*/ !Signed);
2069 if (SrcVT == MVT::i64) {
2071 Opc = (DestVT == MVT::f32) ? AArch64::SCVTFUXSri : AArch64::SCVTFUXDri;
2073 Opc = (DestVT == MVT::f32) ? AArch64::UCVTFUXSri : AArch64::UCVTFUXDri;
2076 Opc = (DestVT == MVT::f32) ? AArch64::SCVTFUWSri : AArch64::SCVTFUWDri;
2078 Opc = (DestVT == MVT::f32) ? AArch64::UCVTFUWSri : AArch64::UCVTFUWDri;
2081 unsigned ResultReg = fastEmitInst_r(Opc, TLI.getRegClassFor(DestVT), SrcReg,
2083 updateValueMap(I, ResultReg);
2087 bool AArch64FastISel::fastLowerArguments() {
2088 if (!FuncInfo.CanLowerReturn)
2091 const Function *F = FuncInfo.Fn;
2095 CallingConv::ID CC = F->getCallingConv();
2096 if (CC != CallingConv::C)
2099 // Only handle simple cases like i1/i8/i16/i32/i64/f32/f64 of up to 8 GPR and
2101 unsigned GPRCnt = 0;
2102 unsigned FPRCnt = 0;
2104 for (auto const &Arg : F->args()) {
2105 // The first argument is at index 1.
2107 if (F->getAttributes().hasAttribute(Idx, Attribute::ByVal) ||
2108 F->getAttributes().hasAttribute(Idx, Attribute::InReg) ||
2109 F->getAttributes().hasAttribute(Idx, Attribute::StructRet) ||
2110 F->getAttributes().hasAttribute(Idx, Attribute::Nest))
2113 Type *ArgTy = Arg.getType();
2114 if (ArgTy->isStructTy() || ArgTy->isArrayTy() || ArgTy->isVectorTy())
2117 EVT ArgVT = TLI.getValueType(ArgTy);
2118 if (!ArgVT.isSimple()) return false;
2119 switch (ArgVT.getSimpleVT().SimpleTy) {
2120 default: return false;
2135 if (GPRCnt > 8 || FPRCnt > 8)
2139 static const MCPhysReg Registers[5][8] = {
2140 { AArch64::W0, AArch64::W1, AArch64::W2, AArch64::W3, AArch64::W4,
2141 AArch64::W5, AArch64::W6, AArch64::W7 },
2142 { AArch64::X0, AArch64::X1, AArch64::X2, AArch64::X3, AArch64::X4,
2143 AArch64::X5, AArch64::X6, AArch64::X7 },
2144 { AArch64::H0, AArch64::H1, AArch64::H2, AArch64::H3, AArch64::H4,
2145 AArch64::H5, AArch64::H6, AArch64::H7 },
2146 { AArch64::S0, AArch64::S1, AArch64::S2, AArch64::S3, AArch64::S4,
2147 AArch64::S5, AArch64::S6, AArch64::S7 },
2148 { AArch64::D0, AArch64::D1, AArch64::D2, AArch64::D3, AArch64::D4,
2149 AArch64::D5, AArch64::D6, AArch64::D7 }
2152 unsigned GPRIdx = 0;
2153 unsigned FPRIdx = 0;
2154 for (auto const &Arg : F->args()) {
2155 MVT VT = TLI.getSimpleValueType(Arg.getType());
2157 const TargetRegisterClass *RC = nullptr;
2158 switch (VT.SimpleTy) {
2159 default: llvm_unreachable("Unexpected value type.");
2162 case MVT::i16: VT = MVT::i32; // fall-through
2164 SrcReg = Registers[0][GPRIdx++]; RC = &AArch64::GPR32RegClass; break;
2166 SrcReg = Registers[1][GPRIdx++]; RC = &AArch64::GPR64RegClass; break;
2168 SrcReg = Registers[2][FPRIdx++]; RC = &AArch64::FPR16RegClass; break;
2170 SrcReg = Registers[3][FPRIdx++]; RC = &AArch64::FPR32RegClass; break;
2172 SrcReg = Registers[4][FPRIdx++]; RC = &AArch64::FPR64RegClass; break;
2175 // Skip unused arguments.
2176 if (Arg.use_empty()) {
2177 updateValueMap(&Arg, 0);
2181 unsigned DstReg = FuncInfo.MF->addLiveIn(SrcReg, RC);
2182 // FIXME: Unfortunately it's necessary to emit a copy from the livein copy.
2183 // Without this, EmitLiveInCopies may eliminate the livein if its only
2184 // use is a bitcast (which isn't turned into an instruction).
2185 unsigned ResultReg = createResultReg(RC);
2186 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2187 TII.get(TargetOpcode::COPY), ResultReg)
2188 .addReg(DstReg, getKillRegState(true));
2189 updateValueMap(&Arg, ResultReg);
2194 bool AArch64FastISel::ProcessCallArgs(CallLoweringInfo &CLI,
2195 SmallVectorImpl<MVT> &OutVTs,
2196 unsigned &NumBytes) {
2197 CallingConv::ID CC = CLI.CallConv;
2198 SmallVector<CCValAssign, 16> ArgLocs;
2199 CCState CCInfo(CC, false, *FuncInfo.MF, ArgLocs, *Context);
2200 CCInfo.AnalyzeCallOperands(OutVTs, CLI.OutFlags, CCAssignFnForCall(CC));
2202 // Get a count of how many bytes are to be pushed on the stack.
2203 NumBytes = CCInfo.getNextStackOffset();
2205 // Issue CALLSEQ_START
2206 unsigned AdjStackDown = TII.getCallFrameSetupOpcode();
2207 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AdjStackDown))
2210 // Process the args.
2211 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2212 CCValAssign &VA = ArgLocs[i];
2213 const Value *ArgVal = CLI.OutVals[VA.getValNo()];
2214 MVT ArgVT = OutVTs[VA.getValNo()];
2216 unsigned ArgReg = getRegForValue(ArgVal);
2220 // Handle arg promotion: SExt, ZExt, AExt.
2221 switch (VA.getLocInfo()) {
2222 case CCValAssign::Full:
2224 case CCValAssign::SExt: {
2225 MVT DestVT = VA.getLocVT();
2227 ArgReg = EmitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/false);
2232 case CCValAssign::AExt:
2233 // Intentional fall-through.
2234 case CCValAssign::ZExt: {
2235 MVT DestVT = VA.getLocVT();
2237 ArgReg = EmitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/true);
2243 llvm_unreachable("Unknown arg promotion!");
2246 // Now copy/store arg to correct locations.
2247 if (VA.isRegLoc() && !VA.needsCustom()) {
2248 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2249 TII.get(TargetOpcode::COPY), VA.getLocReg()).addReg(ArgReg);
2250 CLI.OutRegs.push_back(VA.getLocReg());
2251 } else if (VA.needsCustom()) {
2252 // FIXME: Handle custom args.
2255 assert(VA.isMemLoc() && "Assuming store on stack.");
2257 // Don't emit stores for undef values.
2258 if (isa<UndefValue>(ArgVal))
2261 // Need to store on the stack.
2262 unsigned ArgSize = (ArgVT.getSizeInBits() + 7) / 8;
2264 unsigned BEAlign = 0;
2265 if (ArgSize < 8 && !Subtarget->isLittleEndian())
2266 BEAlign = 8 - ArgSize;
2269 Addr.setKind(Address::RegBase);
2270 Addr.setReg(AArch64::SP);
2271 Addr.setOffset(VA.getLocMemOffset() + BEAlign);
2273 unsigned Alignment = DL.getABITypeAlignment(ArgVal->getType());
2274 MachineMemOperand *MMO = FuncInfo.MF->getMachineMemOperand(
2275 MachinePointerInfo::getStack(Addr.getOffset()),
2276 MachineMemOperand::MOStore, ArgVT.getStoreSize(), Alignment);
2278 if (!EmitStore(ArgVT, ArgReg, Addr, MMO))
2285 bool AArch64FastISel::FinishCall(CallLoweringInfo &CLI, MVT RetVT,
2286 unsigned NumBytes) {
2287 CallingConv::ID CC = CLI.CallConv;
2289 // Issue CALLSEQ_END
2290 unsigned AdjStackUp = TII.getCallFrameDestroyOpcode();
2291 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AdjStackUp))
2292 .addImm(NumBytes).addImm(0);
2294 // Now the return value.
2295 if (RetVT != MVT::isVoid) {
2296 SmallVector<CCValAssign, 16> RVLocs;
2297 CCState CCInfo(CC, false, *FuncInfo.MF, RVLocs, *Context);
2298 CCInfo.AnalyzeCallResult(RetVT, CCAssignFnForCall(CC));
2300 // Only handle a single return value.
2301 if (RVLocs.size() != 1)
2304 // Copy all of the result registers out of their specified physreg.
2305 MVT CopyVT = RVLocs[0].getValVT();
2306 unsigned ResultReg = createResultReg(TLI.getRegClassFor(CopyVT));
2307 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2308 TII.get(TargetOpcode::COPY), ResultReg)
2309 .addReg(RVLocs[0].getLocReg());
2310 CLI.InRegs.push_back(RVLocs[0].getLocReg());
2312 CLI.ResultReg = ResultReg;
2313 CLI.NumResultRegs = 1;
2319 bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) {
2320 CallingConv::ID CC = CLI.CallConv;
2321 bool IsTailCall = CLI.IsTailCall;
2322 bool IsVarArg = CLI.IsVarArg;
2323 const Value *Callee = CLI.Callee;
2324 const char *SymName = CLI.SymName;
2326 if (!Callee && !SymName)
2329 // Allow SelectionDAG isel to handle tail calls.
2333 CodeModel::Model CM = TM.getCodeModel();
2334 // Only support the small and large code model.
2335 if (CM != CodeModel::Small && CM != CodeModel::Large)
2338 // FIXME: Add large code model support for ELF.
2339 if (CM == CodeModel::Large && !Subtarget->isTargetMachO())
2342 // Let SDISel handle vararg functions.
2346 // FIXME: Only handle *simple* calls for now.
2348 if (CLI.RetTy->isVoidTy())
2349 RetVT = MVT::isVoid;
2350 else if (!isTypeLegal(CLI.RetTy, RetVT))
2353 for (auto Flag : CLI.OutFlags)
2354 if (Flag.isInReg() || Flag.isSRet() || Flag.isNest() || Flag.isByVal())
2357 // Set up the argument vectors.
2358 SmallVector<MVT, 16> OutVTs;
2359 OutVTs.reserve(CLI.OutVals.size());
2361 for (auto *Val : CLI.OutVals) {
2363 if (!isTypeLegal(Val->getType(), VT) &&
2364 !(VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16))
2367 // We don't handle vector parameters yet.
2368 if (VT.isVector() || VT.getSizeInBits() > 64)
2371 OutVTs.push_back(VT);
2375 if (Callee && !ComputeCallAddress(Callee, Addr))
2378 // Handle the arguments now that we've gotten them.
2380 if (!ProcessCallArgs(CLI, OutVTs, NumBytes))
2384 MachineInstrBuilder MIB;
2385 if (CM == CodeModel::Small) {
2386 const MCInstrDesc &II = TII.get(Addr.getReg() ? AArch64::BLR : AArch64::BL);
2387 MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II);
2389 MIB.addExternalSymbol(SymName, 0);
2390 else if (Addr.getGlobalValue())
2391 MIB.addGlobalAddress(Addr.getGlobalValue(), 0, 0);
2392 else if (Addr.getReg()) {
2393 unsigned Reg = constrainOperandRegClass(II, Addr.getReg(), 0);
2398 unsigned CallReg = 0;
2400 unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass);
2401 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
2403 .addExternalSymbol(SymName, AArch64II::MO_GOT | AArch64II::MO_PAGE);
2405 CallReg = createResultReg(&AArch64::GPR64RegClass);
2406 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::LDRXui),
2409 .addExternalSymbol(SymName, AArch64II::MO_GOT | AArch64II::MO_PAGEOFF |
2411 } else if (Addr.getGlobalValue()) {
2412 CallReg = AArch64MaterializeGV(Addr.getGlobalValue());
2413 } else if (Addr.getReg())
2414 CallReg = Addr.getReg();
2419 const MCInstrDesc &II = TII.get(AArch64::BLR);
2420 CallReg = constrainOperandRegClass(II, CallReg, 0);
2421 MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(CallReg);
2424 // Add implicit physical register uses to the call.
2425 for (auto Reg : CLI.OutRegs)
2426 MIB.addReg(Reg, RegState::Implicit);
2428 // Add a register mask with the call-preserved registers.
2429 // Proper defs for return values will be added by setPhysRegsDeadExcept().
2430 MIB.addRegMask(TRI.getCallPreservedMask(CC));
2434 // Finish off the call including any return values.
2435 return FinishCall(CLI, RetVT, NumBytes);
2438 bool AArch64FastISel::IsMemCpySmall(uint64_t Len, unsigned Alignment) {
2440 return Len / Alignment <= 4;
2445 bool AArch64FastISel::TryEmitSmallMemCpy(Address Dest, Address Src,
2446 uint64_t Len, unsigned Alignment) {
2447 // Make sure we don't bloat code by inlining very large memcpy's.
2448 if (!IsMemCpySmall(Len, Alignment))
2451 int64_t UnscaledOffset = 0;
2452 Address OrigDest = Dest;
2453 Address OrigSrc = Src;
2457 if (!Alignment || Alignment >= 8) {
2468 // Bound based on alignment.
2469 if (Len >= 4 && Alignment == 4)
2471 else if (Len >= 2 && Alignment == 2)
2480 RV = EmitLoad(VT, ResultReg, Src);
2484 RV = EmitStore(VT, ResultReg, Dest);
2488 int64_t Size = VT.getSizeInBits() / 8;
2490 UnscaledOffset += Size;
2492 // We need to recompute the unscaled offset for each iteration.
2493 Dest.setOffset(OrigDest.getOffset() + UnscaledOffset);
2494 Src.setOffset(OrigSrc.getOffset() + UnscaledOffset);
2500 /// \brief Check if it is possible to fold the condition from the XALU intrinsic
2501 /// into the user. The condition code will only be updated on success.
2502 bool AArch64FastISel::foldXALUIntrinsic(AArch64CC::CondCode &CC,
2503 const Instruction *I,
2504 const Value *Cond) {
2505 if (!isa<ExtractValueInst>(Cond))
2508 const auto *EV = cast<ExtractValueInst>(Cond);
2509 if (!isa<IntrinsicInst>(EV->getAggregateOperand()))
2512 const auto *II = cast<IntrinsicInst>(EV->getAggregateOperand());
2514 const Function *Callee = II->getCalledFunction();
2516 cast<StructType>(Callee->getReturnType())->getTypeAtIndex(0U);
2517 if (!isTypeLegal(RetTy, RetVT))
2520 if (RetVT != MVT::i32 && RetVT != MVT::i64)
2523 AArch64CC::CondCode TmpCC;
2524 switch (II->getIntrinsicID()) {
2525 default: return false;
2526 case Intrinsic::sadd_with_overflow:
2527 case Intrinsic::ssub_with_overflow: TmpCC = AArch64CC::VS; break;
2528 case Intrinsic::uadd_with_overflow: TmpCC = AArch64CC::HS; break;
2529 case Intrinsic::usub_with_overflow: TmpCC = AArch64CC::LO; break;
2530 case Intrinsic::smul_with_overflow:
2531 case Intrinsic::umul_with_overflow: TmpCC = AArch64CC::NE; break;
2534 // Check if both instructions are in the same basic block.
2535 if (II->getParent() != I->getParent())
2538 // Make sure nothing is in the way
2539 BasicBlock::const_iterator Start = I;
2540 BasicBlock::const_iterator End = II;
2541 for (auto Itr = std::prev(Start); Itr != End; --Itr) {
2542 // We only expect extractvalue instructions between the intrinsic and the
2543 // instruction to be selected.
2544 if (!isa<ExtractValueInst>(Itr))
2547 // Check that the extractvalue operand comes from the intrinsic.
2548 const auto *EVI = cast<ExtractValueInst>(Itr);
2549 if (EVI->getAggregateOperand() != II)
2557 bool AArch64FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) {
2558 // FIXME: Handle more intrinsics.
2559 switch (II->getIntrinsicID()) {
2560 default: return false;
2561 case Intrinsic::frameaddress: {
2562 MachineFrameInfo *MFI = FuncInfo.MF->getFrameInfo();
2563 MFI->setFrameAddressIsTaken(true);
2565 const AArch64RegisterInfo *RegInfo =
2566 static_cast<const AArch64RegisterInfo *>(
2567 TM.getSubtargetImpl()->getRegisterInfo());
2568 unsigned FramePtr = RegInfo->getFrameRegister(*(FuncInfo.MF));
2569 unsigned SrcReg = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
2570 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2571 TII.get(TargetOpcode::COPY), SrcReg).addReg(FramePtr);
2572 // Recursively load frame address
2578 unsigned Depth = cast<ConstantInt>(II->getOperand(0))->getZExtValue();
2580 DestReg = fastEmitInst_ri(AArch64::LDRXui, &AArch64::GPR64RegClass,
2581 SrcReg, /*IsKill=*/true, 0);
2582 assert(DestReg && "Unexpected LDR instruction emission failure.");
2586 updateValueMap(II, SrcReg);
2589 case Intrinsic::memcpy:
2590 case Intrinsic::memmove: {
2591 const auto *MTI = cast<MemTransferInst>(II);
2592 // Don't handle volatile.
2593 if (MTI->isVolatile())
2596 // Disable inlining for memmove before calls to ComputeAddress. Otherwise,
2597 // we would emit dead code because we don't currently handle memmoves.
2598 bool IsMemCpy = (II->getIntrinsicID() == Intrinsic::memcpy);
2599 if (isa<ConstantInt>(MTI->getLength()) && IsMemCpy) {
2600 // Small memcpy's are common enough that we want to do them without a call
2602 uint64_t Len = cast<ConstantInt>(MTI->getLength())->getZExtValue();
2603 unsigned Alignment = MTI->getAlignment();
2604 if (IsMemCpySmall(Len, Alignment)) {
2606 if (!ComputeAddress(MTI->getRawDest(), Dest) ||
2607 !ComputeAddress(MTI->getRawSource(), Src))
2609 if (TryEmitSmallMemCpy(Dest, Src, Len, Alignment))
2614 if (!MTI->getLength()->getType()->isIntegerTy(64))
2617 if (MTI->getSourceAddressSpace() > 255 || MTI->getDestAddressSpace() > 255)
2618 // Fast instruction selection doesn't support the special
2622 const char *IntrMemName = isa<MemCpyInst>(II) ? "memcpy" : "memmove";
2623 return lowerCallTo(II, IntrMemName, II->getNumArgOperands() - 2);
2625 case Intrinsic::memset: {
2626 const MemSetInst *MSI = cast<MemSetInst>(II);
2627 // Don't handle volatile.
2628 if (MSI->isVolatile())
2631 if (!MSI->getLength()->getType()->isIntegerTy(64))
2634 if (MSI->getDestAddressSpace() > 255)
2635 // Fast instruction selection doesn't support the special
2639 return lowerCallTo(II, "memset", II->getNumArgOperands() - 2);
2641 case Intrinsic::sin:
2642 case Intrinsic::cos:
2643 case Intrinsic::pow: {
2645 if (!isTypeLegal(II->getType(), RetVT))
2648 if (RetVT != MVT::f32 && RetVT != MVT::f64)
2651 static const RTLIB::Libcall LibCallTable[3][2] = {
2652 { RTLIB::SIN_F32, RTLIB::SIN_F64 },
2653 { RTLIB::COS_F32, RTLIB::COS_F64 },
2654 { RTLIB::POW_F32, RTLIB::POW_F64 }
2657 bool Is64Bit = RetVT == MVT::f64;
2658 switch (II->getIntrinsicID()) {
2660 llvm_unreachable("Unexpected intrinsic.");
2661 case Intrinsic::sin:
2662 LC = LibCallTable[0][Is64Bit];
2664 case Intrinsic::cos:
2665 LC = LibCallTable[1][Is64Bit];
2667 case Intrinsic::pow:
2668 LC = LibCallTable[2][Is64Bit];
2673 Args.reserve(II->getNumArgOperands());
2675 // Populate the argument list.
2676 for (auto &Arg : II->arg_operands()) {
2679 Entry.Ty = Arg->getType();
2680 Args.push_back(Entry);
2683 CallLoweringInfo CLI;
2684 CLI.setCallee(TLI.getLibcallCallingConv(LC), II->getType(),
2685 TLI.getLibcallName(LC), std::move(Args));
2686 if (!lowerCallTo(CLI))
2688 updateValueMap(II, CLI.ResultReg);
2691 case Intrinsic::trap: {
2692 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::BRK))
2696 case Intrinsic::sqrt: {
2697 Type *RetTy = II->getCalledFunction()->getReturnType();
2700 if (!isTypeLegal(RetTy, VT))
2703 unsigned Op0Reg = getRegForValue(II->getOperand(0));
2706 bool Op0IsKill = hasTrivialKill(II->getOperand(0));
2708 unsigned ResultReg = fastEmit_r(VT, VT, ISD::FSQRT, Op0Reg, Op0IsKill);
2712 updateValueMap(II, ResultReg);
2715 case Intrinsic::sadd_with_overflow:
2716 case Intrinsic::uadd_with_overflow:
2717 case Intrinsic::ssub_with_overflow:
2718 case Intrinsic::usub_with_overflow:
2719 case Intrinsic::smul_with_overflow:
2720 case Intrinsic::umul_with_overflow: {
2721 // This implements the basic lowering of the xalu with overflow intrinsics.
2722 const Function *Callee = II->getCalledFunction();
2723 auto *Ty = cast<StructType>(Callee->getReturnType());
2724 Type *RetTy = Ty->getTypeAtIndex(0U);
2727 if (!isTypeLegal(RetTy, VT))
2730 if (VT != MVT::i32 && VT != MVT::i64)
2733 const Value *LHS = II->getArgOperand(0);
2734 const Value *RHS = II->getArgOperand(1);
2735 // Canonicalize immediate to the RHS.
2736 if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS) &&
2737 isCommutativeIntrinsic(II))
2738 std::swap(LHS, RHS);
2740 unsigned ResultReg1 = 0, ResultReg2 = 0, MulReg = 0;
2741 AArch64CC::CondCode CC = AArch64CC::Invalid;
2742 switch (II->getIntrinsicID()) {
2743 default: llvm_unreachable("Unexpected intrinsic!");
2744 case Intrinsic::sadd_with_overflow:
2745 ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true);
2748 case Intrinsic::uadd_with_overflow:
2749 ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true);
2752 case Intrinsic::ssub_with_overflow:
2753 ResultReg1 = emitSub(VT, LHS, RHS, /*SetFlags=*/true);
2756 case Intrinsic::usub_with_overflow:
2757 ResultReg1 = emitSub(VT, LHS, RHS, /*SetFlags=*/true);
2760 case Intrinsic::smul_with_overflow: {
2762 unsigned LHSReg = getRegForValue(LHS);
2765 bool LHSIsKill = hasTrivialKill(LHS);
2767 unsigned RHSReg = getRegForValue(RHS);
2770 bool RHSIsKill = hasTrivialKill(RHS);
2772 if (VT == MVT::i32) {
2773 MulReg = Emit_SMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
2774 unsigned ShiftReg = emitLSR_ri(MVT::i64, MVT::i64, MulReg,
2775 /*IsKill=*/false, 32);
2776 MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
2778 ShiftReg = fastEmitInst_extractsubreg(VT, ShiftReg, /*IsKill=*/true,
2780 emitSubs_rs(VT, ShiftReg, /*IsKill=*/true, MulReg, /*IsKill=*/false,
2781 AArch64_AM::ASR, 31, /*WantResult=*/false);
2783 assert(VT == MVT::i64 && "Unexpected value type.");
2784 MulReg = Emit_MUL_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
2785 unsigned SMULHReg = fastEmit_rr(VT, VT, ISD::MULHS, LHSReg, LHSIsKill,
2787 emitSubs_rs(VT, SMULHReg, /*IsKill=*/true, MulReg, /*IsKill=*/false,
2788 AArch64_AM::ASR, 63, /*WantResult=*/false);
2792 case Intrinsic::umul_with_overflow: {
2794 unsigned LHSReg = getRegForValue(LHS);
2797 bool LHSIsKill = hasTrivialKill(LHS);
2799 unsigned RHSReg = getRegForValue(RHS);
2802 bool RHSIsKill = hasTrivialKill(RHS);
2804 if (VT == MVT::i32) {
2805 MulReg = Emit_UMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
2806 emitSubs_rs(MVT::i64, AArch64::XZR, /*IsKill=*/true, MulReg,
2807 /*IsKill=*/false, AArch64_AM::LSR, 32,
2808 /*WantResult=*/false);
2809 MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
2812 assert(VT == MVT::i64 && "Unexpected value type.");
2813 MulReg = Emit_MUL_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
2814 unsigned UMULHReg = fastEmit_rr(VT, VT, ISD::MULHU, LHSReg, LHSIsKill,
2816 emitSubs_rr(VT, AArch64::XZR, /*IsKill=*/true, UMULHReg,
2817 /*IsKill=*/false, /*WantResult=*/false);
2824 ResultReg1 = createResultReg(TLI.getRegClassFor(VT));
2825 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2826 TII.get(TargetOpcode::COPY), ResultReg1).addReg(MulReg);
2829 ResultReg2 = fastEmitInst_rri(AArch64::CSINCWr, &AArch64::GPR32RegClass,
2830 AArch64::WZR, /*IsKill=*/true, AArch64::WZR,
2831 /*IsKill=*/true, getInvertedCondCode(CC));
2832 assert((ResultReg1 + 1) == ResultReg2 &&
2833 "Nonconsecutive result registers.");
2834 updateValueMap(II, ResultReg1, 2);
2841 bool AArch64FastISel::SelectRet(const Instruction *I) {
2842 const ReturnInst *Ret = cast<ReturnInst>(I);
2843 const Function &F = *I->getParent()->getParent();
2845 if (!FuncInfo.CanLowerReturn)
2851 // Build a list of return value registers.
2852 SmallVector<unsigned, 4> RetRegs;
2854 if (Ret->getNumOperands() > 0) {
2855 CallingConv::ID CC = F.getCallingConv();
2856 SmallVector<ISD::OutputArg, 4> Outs;
2857 GetReturnInfo(F.getReturnType(), F.getAttributes(), Outs, TLI);
2859 // Analyze operands of the call, assigning locations to each operand.
2860 SmallVector<CCValAssign, 16> ValLocs;
2861 CCState CCInfo(CC, F.isVarArg(), *FuncInfo.MF, ValLocs, I->getContext());
2862 CCAssignFn *RetCC = CC == CallingConv::WebKit_JS ? RetCC_AArch64_WebKit_JS
2863 : RetCC_AArch64_AAPCS;
2864 CCInfo.AnalyzeReturn(Outs, RetCC);
2866 // Only handle a single return value for now.
2867 if (ValLocs.size() != 1)
2870 CCValAssign &VA = ValLocs[0];
2871 const Value *RV = Ret->getOperand(0);
2873 // Don't bother handling odd stuff for now.
2874 if (VA.getLocInfo() != CCValAssign::Full)
2876 // Only handle register returns for now.
2879 unsigned Reg = getRegForValue(RV);
2883 unsigned SrcReg = Reg + VA.getValNo();
2884 unsigned DestReg = VA.getLocReg();
2885 // Avoid a cross-class copy. This is very unlikely.
2886 if (!MRI.getRegClass(SrcReg)->contains(DestReg))
2889 EVT RVEVT = TLI.getValueType(RV->getType());
2890 if (!RVEVT.isSimple())
2893 // Vectors (of > 1 lane) in big endian need tricky handling.
2894 if (RVEVT.isVector() && RVEVT.getVectorNumElements() > 1)
2897 MVT RVVT = RVEVT.getSimpleVT();
2898 if (RVVT == MVT::f128)
2900 MVT DestVT = VA.getValVT();
2901 // Special handling for extended integers.
2902 if (RVVT != DestVT) {
2903 if (RVVT != MVT::i1 && RVVT != MVT::i8 && RVVT != MVT::i16)
2906 if (!Outs[0].Flags.isZExt() && !Outs[0].Flags.isSExt())
2909 bool isZExt = Outs[0].Flags.isZExt();
2910 SrcReg = EmitIntExt(RVVT, SrcReg, DestVT, isZExt);
2916 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2917 TII.get(TargetOpcode::COPY), DestReg).addReg(SrcReg);
2919 // Add register to return instruction.
2920 RetRegs.push_back(VA.getLocReg());
2923 MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2924 TII.get(AArch64::RET_ReallyLR));
2925 for (unsigned i = 0, e = RetRegs.size(); i != e; ++i)
2926 MIB.addReg(RetRegs[i], RegState::Implicit);
2930 bool AArch64FastISel::SelectTrunc(const Instruction *I) {
2931 Type *DestTy = I->getType();
2932 Value *Op = I->getOperand(0);
2933 Type *SrcTy = Op->getType();
2935 EVT SrcEVT = TLI.getValueType(SrcTy, true);
2936 EVT DestEVT = TLI.getValueType(DestTy, true);
2937 if (!SrcEVT.isSimple())
2939 if (!DestEVT.isSimple())
2942 MVT SrcVT = SrcEVT.getSimpleVT();
2943 MVT DestVT = DestEVT.getSimpleVT();
2945 if (SrcVT != MVT::i64 && SrcVT != MVT::i32 && SrcVT != MVT::i16 &&
2948 if (DestVT != MVT::i32 && DestVT != MVT::i16 && DestVT != MVT::i8 &&
2952 unsigned SrcReg = getRegForValue(Op);
2955 bool SrcIsKill = hasTrivialKill(Op);
2957 // If we're truncating from i64 to a smaller non-legal type then generate an
2958 // AND. Otherwise, we know the high bits are undefined and a truncate only
2959 // generate a COPY. We cannot mark the source register also as result
2960 // register, because this can incorrectly transfer the kill flag onto the
2963 if (SrcVT == MVT::i64) {
2965 switch (DestVT.SimpleTy) {
2967 // Trunc i64 to i32 is handled by the target-independent fast-isel.
2979 // Issue an extract_subreg to get the lower 32-bits.
2980 unsigned Reg32 = fastEmitInst_extractsubreg(MVT::i32, SrcReg, SrcIsKill,
2982 // Create the AND instruction which performs the actual truncation.
2983 ResultReg = emitAnd_ri(MVT::i32, Reg32, /*IsKill=*/true, Mask);
2984 assert(ResultReg && "Unexpected AND instruction emission failure.");
2986 ResultReg = createResultReg(&AArch64::GPR32RegClass);
2987 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
2988 TII.get(TargetOpcode::COPY), ResultReg)
2989 .addReg(SrcReg, getKillRegState(SrcIsKill));
2992 updateValueMap(I, ResultReg);
2996 unsigned AArch64FastISel::Emiti1Ext(unsigned SrcReg, MVT DestVT, bool isZExt) {
2997 assert((DestVT == MVT::i8 || DestVT == MVT::i16 || DestVT == MVT::i32 ||
2998 DestVT == MVT::i64) &&
2999 "Unexpected value type.");
3000 // Handle i8 and i16 as i32.
3001 if (DestVT == MVT::i8 || DestVT == MVT::i16)
3005 unsigned ResultReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1);
3006 assert(ResultReg && "Unexpected AND instruction emission failure.");
3007 if (DestVT == MVT::i64) {
3008 // We're ZExt i1 to i64. The ANDWri Wd, Ws, #1 implicitly clears the
3009 // upper 32 bits. Emit a SUBREG_TO_REG to extend from Wd to Xd.
3010 unsigned Reg64 = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
3011 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
3012 TII.get(AArch64::SUBREG_TO_REG), Reg64)
3015 .addImm(AArch64::sub_32);
3020 if (DestVT == MVT::i64) {
3021 // FIXME: We're SExt i1 to i64.
3024 return fastEmitInst_rii(AArch64::SBFMWri, &AArch64::GPR32RegClass, SrcReg,
3025 /*TODO:IsKill=*/false, 0, 0);
3029 unsigned AArch64FastISel::Emit_MUL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
3030 unsigned Op1, bool Op1IsKill) {
3032 switch (RetVT.SimpleTy) {
3038 Opc = AArch64::MADDWrrr; ZReg = AArch64::WZR; break;
3040 Opc = AArch64::MADDXrrr; ZReg = AArch64::XZR; break;
3043 const TargetRegisterClass *RC =
3044 (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3045 return fastEmitInst_rrr(Opc, RC, Op0, Op0IsKill, Op1, Op1IsKill,
3046 /*IsKill=*/ZReg, true);
3049 unsigned AArch64FastISel::Emit_SMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
3050 unsigned Op1, bool Op1IsKill) {
3051 if (RetVT != MVT::i64)
3054 return fastEmitInst_rrr(AArch64::SMADDLrrr, &AArch64::GPR64RegClass,
3055 Op0, Op0IsKill, Op1, Op1IsKill,
3056 AArch64::XZR, /*IsKill=*/true);
3059 unsigned AArch64FastISel::Emit_UMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
3060 unsigned Op1, bool Op1IsKill) {
3061 if (RetVT != MVT::i64)
3064 return fastEmitInst_rrr(AArch64::UMADDLrrr, &AArch64::GPR64RegClass,
3065 Op0, Op0IsKill, Op1, Op1IsKill,
3066 AArch64::XZR, /*IsKill=*/true);
3069 unsigned AArch64FastISel::emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
3070 unsigned Op1Reg, bool Op1IsKill) {
3072 bool NeedTrunc = false;
3074 switch (RetVT.SimpleTy) {
3076 case MVT::i8: Opc = AArch64::LSLVWr; NeedTrunc = true; Mask = 0xff; break;
3077 case MVT::i16: Opc = AArch64::LSLVWr; NeedTrunc = true; Mask = 0xffff; break;
3078 case MVT::i32: Opc = AArch64::LSLVWr; break;
3079 case MVT::i64: Opc = AArch64::LSLVXr; break;
3082 const TargetRegisterClass *RC =
3083 (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3085 Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
3088 unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg,
3091 ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
3095 unsigned AArch64FastISel::emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0,
3096 bool Op0IsKill, uint64_t Shift,
3098 assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&
3099 "Unexpected source/return type pair.");
3100 assert((SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 ||
3101 SrcVT == MVT::i64) && "Unexpected source value type.");
3102 assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||
3103 RetVT == MVT::i64) && "Unexpected return value type.");
3105 bool Is64Bit = (RetVT == MVT::i64);
3106 unsigned RegSize = Is64Bit ? 64 : 32;
3107 unsigned DstBits = RetVT.getSizeInBits();
3108 unsigned SrcBits = SrcVT.getSizeInBits();
3110 // Don't deal with undefined shifts.
3111 if (Shift >= DstBits)
3114 // For immediate shifts we can fold the zero-/sign-extension into the shift.
3115 // {S|U}BFM Wd, Wn, #r, #s
3116 // Wd<32+s-r,32-r> = Wn<s:0> when r > s
3118 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3119 // %2 = shl i16 %1, 4
3120 // Wd<32+7-28,32-28> = Wn<7:0> <- clamp s to 7
3121 // 0b1111_1111_1111_1111__1111_1010_1010_0000 sext
3122 // 0b0000_0000_0000_0000__0000_0101_0101_0000 sext | zext
3123 // 0b0000_0000_0000_0000__0000_1010_1010_0000 zext
3125 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3126 // %2 = shl i16 %1, 8
3127 // Wd<32+7-24,32-24> = Wn<7:0>
3128 // 0b1111_1111_1111_1111__1010_1010_0000_0000 sext
3129 // 0b0000_0000_0000_0000__0101_0101_0000_0000 sext | zext
3130 // 0b0000_0000_0000_0000__1010_1010_0000_0000 zext
3132 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3133 // %2 = shl i16 %1, 12
3134 // Wd<32+3-20,32-20> = Wn<3:0>
3135 // 0b1111_1111_1111_1111__1010_0000_0000_0000 sext
3136 // 0b0000_0000_0000_0000__0101_0000_0000_0000 sext | zext
3137 // 0b0000_0000_0000_0000__1010_0000_0000_0000 zext
3139 unsigned ImmR = RegSize - Shift;
3140 // Limit the width to the length of the source type.
3141 unsigned ImmS = std::min<unsigned>(SrcBits - 1, DstBits - 1 - Shift);
3142 static const unsigned OpcTable[2][2] = {
3143 {AArch64::SBFMWri, AArch64::SBFMXri},
3144 {AArch64::UBFMWri, AArch64::UBFMXri}
3146 unsigned Opc = OpcTable[IsZext][Is64Bit];
3147 const TargetRegisterClass *RC =
3148 Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3149 if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) {
3150 unsigned TmpReg = MRI.createVirtualRegister(RC);
3151 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
3152 TII.get(AArch64::SUBREG_TO_REG), TmpReg)
3154 .addReg(Op0, getKillRegState(Op0IsKill))
3155 .addImm(AArch64::sub_32);
3159 return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
3162 unsigned AArch64FastISel::emitLSR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
3163 unsigned Op1Reg, bool Op1IsKill) {
3165 bool NeedTrunc = false;
3167 switch (RetVT.SimpleTy) {
3169 case MVT::i8: Opc = AArch64::LSRVWr; NeedTrunc = true; Mask = 0xff; break;
3170 case MVT::i16: Opc = AArch64::LSRVWr; NeedTrunc = true; Mask = 0xffff; break;
3171 case MVT::i32: Opc = AArch64::LSRVWr; break;
3172 case MVT::i64: Opc = AArch64::LSRVXr; break;
3175 const TargetRegisterClass *RC =
3176 (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3178 Op0Reg = emitAnd_ri(MVT::i32, Op0Reg, Op0IsKill, Mask);
3179 Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
3180 Op0IsKill = Op1IsKill = true;
3182 unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg,
3185 ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
3189 unsigned AArch64FastISel::emitLSR_ri(MVT RetVT, MVT SrcVT, unsigned Op0,
3190 bool Op0IsKill, uint64_t Shift,
3192 assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&
3193 "Unexpected source/return type pair.");
3194 assert((SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 ||
3195 SrcVT == MVT::i64) && "Unexpected source value type.");
3196 assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||
3197 RetVT == MVT::i64) && "Unexpected return value type.");
3199 bool Is64Bit = (RetVT == MVT::i64);
3200 unsigned RegSize = Is64Bit ? 64 : 32;
3201 unsigned DstBits = RetVT.getSizeInBits();
3202 unsigned SrcBits = SrcVT.getSizeInBits();
3204 // Don't deal with undefined shifts.
3205 if (Shift >= DstBits)
3208 // For immediate shifts we can fold the zero-/sign-extension into the shift.
3209 // {S|U}BFM Wd, Wn, #r, #s
3210 // Wd<s-r:0> = Wn<s:r> when r <= s
3212 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3213 // %2 = lshr i16 %1, 4
3214 // Wd<7-4:0> = Wn<7:4>
3215 // 0b0000_0000_0000_0000__0000_1111_1111_1010 sext
3216 // 0b0000_0000_0000_0000__0000_0000_0000_0101 sext | zext
3217 // 0b0000_0000_0000_0000__0000_0000_0000_1010 zext
3219 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3220 // %2 = lshr i16 %1, 8
3221 // Wd<7-7,0> = Wn<7:7>
3222 // 0b0000_0000_0000_0000__0000_0000_1111_1111 sext
3223 // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
3224 // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
3226 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3227 // %2 = lshr i16 %1, 12
3228 // Wd<7-7,0> = Wn<7:7> <- clamp r to 7
3229 // 0b0000_0000_0000_0000__0000_0000_0000_1111 sext
3230 // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
3231 // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
3233 if (Shift >= SrcBits && IsZExt)
3234 return AArch64MaterializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)),
3237 // It is not possible to fold a sign-extend into the LShr instruction. In this
3238 // case emit a sign-extend.
3240 Op0 = EmitIntExt(SrcVT, Op0, RetVT, IsZExt);
3245 SrcBits = SrcVT.getSizeInBits();
3249 unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift);
3250 unsigned ImmS = SrcBits - 1;
3251 static const unsigned OpcTable[2][2] = {
3252 {AArch64::SBFMWri, AArch64::SBFMXri},
3253 {AArch64::UBFMWri, AArch64::UBFMXri}
3255 unsigned Opc = OpcTable[IsZExt][Is64Bit];
3256 const TargetRegisterClass *RC =
3257 Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3258 if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) {
3259 unsigned TmpReg = MRI.createVirtualRegister(RC);
3260 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
3261 TII.get(AArch64::SUBREG_TO_REG), TmpReg)
3263 .addReg(Op0, getKillRegState(Op0IsKill))
3264 .addImm(AArch64::sub_32);
3268 return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
3271 unsigned AArch64FastISel::emitASR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
3272 unsigned Op1Reg, bool Op1IsKill) {
3274 bool NeedTrunc = false;
3276 switch (RetVT.SimpleTy) {
3278 case MVT::i8: Opc = AArch64::ASRVWr; NeedTrunc = true; Mask = 0xff; break;
3279 case MVT::i16: Opc = AArch64::ASRVWr; NeedTrunc = true; Mask = 0xffff; break;
3280 case MVT::i32: Opc = AArch64::ASRVWr; break;
3281 case MVT::i64: Opc = AArch64::ASRVXr; break;
3284 const TargetRegisterClass *RC =
3285 (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3287 Op0Reg = EmitIntExt(RetVT, Op0Reg, MVT::i32, /*IsZExt=*/false);
3288 Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
3289 Op0IsKill = Op1IsKill = true;
3291 unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg,
3294 ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
3298 unsigned AArch64FastISel::emitASR_ri(MVT RetVT, MVT SrcVT, unsigned Op0,
3299 bool Op0IsKill, uint64_t Shift,
3301 assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&
3302 "Unexpected source/return type pair.");
3303 assert((SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 ||
3304 SrcVT == MVT::i64) && "Unexpected source value type.");
3305 assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||
3306 RetVT == MVT::i64) && "Unexpected return value type.");
3308 bool Is64Bit = (RetVT == MVT::i64);
3309 unsigned RegSize = Is64Bit ? 64 : 32;
3310 unsigned DstBits = RetVT.getSizeInBits();
3311 unsigned SrcBits = SrcVT.getSizeInBits();
3313 // Don't deal with undefined shifts.
3314 if (Shift >= DstBits)
3317 // For immediate shifts we can fold the zero-/sign-extension into the shift.
3318 // {S|U}BFM Wd, Wn, #r, #s
3319 // Wd<s-r:0> = Wn<s:r> when r <= s
3321 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3322 // %2 = ashr i16 %1, 4
3323 // Wd<7-4:0> = Wn<7:4>
3324 // 0b1111_1111_1111_1111__1111_1111_1111_1010 sext
3325 // 0b0000_0000_0000_0000__0000_0000_0000_0101 sext | zext
3326 // 0b0000_0000_0000_0000__0000_0000_0000_1010 zext
3328 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3329 // %2 = ashr i16 %1, 8
3330 // Wd<7-7,0> = Wn<7:7>
3331 // 0b1111_1111_1111_1111__1111_1111_1111_1111 sext
3332 // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
3333 // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
3335 // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
3336 // %2 = ashr i16 %1, 12
3337 // Wd<7-7,0> = Wn<7:7> <- clamp r to 7
3338 // 0b1111_1111_1111_1111__1111_1111_1111_1111 sext
3339 // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
3340 // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
3342 if (Shift >= SrcBits && IsZExt)
3343 return AArch64MaterializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)),
3346 unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift);
3347 unsigned ImmS = SrcBits - 1;
3348 static const unsigned OpcTable[2][2] = {
3349 {AArch64::SBFMWri, AArch64::SBFMXri},
3350 {AArch64::UBFMWri, AArch64::UBFMXri}
3352 unsigned Opc = OpcTable[IsZExt][Is64Bit];
3353 const TargetRegisterClass *RC =
3354 Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3355 if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) {
3356 unsigned TmpReg = MRI.createVirtualRegister(RC);
3357 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
3358 TII.get(AArch64::SUBREG_TO_REG), TmpReg)
3360 .addReg(Op0, getKillRegState(Op0IsKill))
3361 .addImm(AArch64::sub_32);
3365 return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
3368 unsigned AArch64FastISel::EmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT,
3370 assert(DestVT != MVT::i1 && "ZeroExt/SignExt an i1?");
3372 // FastISel does not have plumbing to deal with extensions where the SrcVT or
3373 // DestVT are odd things, so test to make sure that they are both types we can
3374 // handle (i1/i8/i16/i32 for SrcVT and i8/i16/i32/i64 for DestVT), otherwise
3375 // bail out to SelectionDAG.
3376 if (((DestVT != MVT::i8) && (DestVT != MVT::i16) &&
3377 (DestVT != MVT::i32) && (DestVT != MVT::i64)) ||
3378 ((SrcVT != MVT::i1) && (SrcVT != MVT::i8) &&
3379 (SrcVT != MVT::i16) && (SrcVT != MVT::i32)))
3385 switch (SrcVT.SimpleTy) {
3389 return Emiti1Ext(SrcReg, DestVT, isZExt);
3391 if (DestVT == MVT::i64)
3392 Opc = isZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
3394 Opc = isZExt ? AArch64::UBFMWri : AArch64::SBFMWri;
3398 if (DestVT == MVT::i64)
3399 Opc = isZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
3401 Opc = isZExt ? AArch64::UBFMWri : AArch64::SBFMWri;
3405 assert(DestVT == MVT::i64 && "IntExt i32 to i32?!?");
3406 Opc = isZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
3411 // Handle i8 and i16 as i32.
3412 if (DestVT == MVT::i8 || DestVT == MVT::i16)
3414 else if (DestVT == MVT::i64) {
3415 unsigned Src64 = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
3416 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
3417 TII.get(AArch64::SUBREG_TO_REG), Src64)
3420 .addImm(AArch64::sub_32);
3424 const TargetRegisterClass *RC =
3425 (DestVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3426 return fastEmitInst_rii(Opc, RC, SrcReg, /*TODO:IsKill=*/false, 0, Imm);
3429 bool AArch64FastISel::SelectIntExt(const Instruction *I) {
3430 // On ARM, in general, integer casts don't involve legal types; this code
3431 // handles promotable integers. The high bits for a type smaller than
3432 // the register size are assumed to be undefined.
3433 Type *DestTy = I->getType();
3434 Value *Src = I->getOperand(0);
3435 Type *SrcTy = Src->getType();
3437 bool isZExt = isa<ZExtInst>(I);
3438 unsigned SrcReg = getRegForValue(Src);
3442 EVT SrcEVT = TLI.getValueType(SrcTy, true);
3443 EVT DestEVT = TLI.getValueType(DestTy, true);
3444 if (!SrcEVT.isSimple())
3446 if (!DestEVT.isSimple())
3449 MVT SrcVT = SrcEVT.getSimpleVT();
3450 MVT DestVT = DestEVT.getSimpleVT();
3451 unsigned ResultReg = 0;
3453 // Check if it is an argument and if it is already zero/sign-extended.
3454 if (const auto *Arg = dyn_cast<Argument>(Src)) {
3455 if ((isZExt && Arg->hasZExtAttr()) || (!isZExt && Arg->hasSExtAttr())) {
3456 if (DestVT == MVT::i64) {
3457 ResultReg = createResultReg(TLI.getRegClassFor(DestVT));
3458 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
3459 TII.get(AArch64::SUBREG_TO_REG), ResultReg)
3462 .addImm(AArch64::sub_32);
3469 ResultReg = EmitIntExt(SrcVT, SrcReg, DestVT, isZExt);
3474 updateValueMap(I, ResultReg);
3478 bool AArch64FastISel::SelectRem(const Instruction *I, unsigned ISDOpcode) {
3479 EVT DestEVT = TLI.getValueType(I->getType(), true);
3480 if (!DestEVT.isSimple())
3483 MVT DestVT = DestEVT.getSimpleVT();
3484 if (DestVT != MVT::i64 && DestVT != MVT::i32)
3488 bool is64bit = (DestVT == MVT::i64);
3489 switch (ISDOpcode) {
3493 DivOpc = is64bit ? AArch64::SDIVXr : AArch64::SDIVWr;
3496 DivOpc = is64bit ? AArch64::UDIVXr : AArch64::UDIVWr;
3499 unsigned MSubOpc = is64bit ? AArch64::MSUBXrrr : AArch64::MSUBWrrr;
3500 unsigned Src0Reg = getRegForValue(I->getOperand(0));
3503 bool Src0IsKill = hasTrivialKill(I->getOperand(0));
3505 unsigned Src1Reg = getRegForValue(I->getOperand(1));
3508 bool Src1IsKill = hasTrivialKill(I->getOperand(1));
3510 const TargetRegisterClass *RC =
3511 (DestVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
3512 unsigned QuotReg = fastEmitInst_rr(DivOpc, RC, Src0Reg, /*IsKill=*/false,
3513 Src1Reg, /*IsKill=*/false);
3514 assert(QuotReg && "Unexpected DIV instruction emission failure.");
3515 // The remainder is computed as numerator - (quotient * denominator) using the
3516 // MSUB instruction.
3517 unsigned ResultReg = fastEmitInst_rrr(MSubOpc, RC, QuotReg, /*IsKill=*/true,
3518 Src1Reg, Src1IsKill, Src0Reg,
3520 updateValueMap(I, ResultReg);
3524 bool AArch64FastISel::SelectMul(const Instruction *I) {
3525 EVT SrcEVT = TLI.getValueType(I->getOperand(0)->getType(), true);
3526 if (!SrcEVT.isSimple())
3528 MVT SrcVT = SrcEVT.getSimpleVT();
3530 // Must be simple value type. Don't handle vectors.
3531 if (SrcVT != MVT::i64 && SrcVT != MVT::i32 && SrcVT != MVT::i16 &&
3535 unsigned Src0Reg = getRegForValue(I->getOperand(0));
3538 bool Src0IsKill = hasTrivialKill(I->getOperand(0));
3540 unsigned Src1Reg = getRegForValue(I->getOperand(1));
3543 bool Src1IsKill = hasTrivialKill(I->getOperand(1));
3545 unsigned ResultReg =
3546 Emit_MUL_rr(SrcVT, Src0Reg, Src0IsKill, Src1Reg, Src1IsKill);
3551 updateValueMap(I, ResultReg);
3555 bool AArch64FastISel::SelectShift(const Instruction *I) {
3557 if (!isTypeSupported(I->getType(), RetVT, /*IsVectorAllowed=*/true))
3560 if (RetVT.isVector())
3561 return selectOperator(I, I->getOpcode());
3563 if (const auto *C = dyn_cast<ConstantInt>(I->getOperand(1))) {
3564 unsigned ResultReg = 0;
3565 uint64_t ShiftVal = C->getZExtValue();
3567 bool IsZExt = (I->getOpcode() == Instruction::AShr) ? false : true;
3568 const Value *Op0 = I->getOperand(0);
3569 if (const auto *ZExt = dyn_cast<ZExtInst>(Op0)) {
3571 if (isValueAvailable(ZExt) && isTypeSupported(ZExt->getSrcTy(), TmpVT)) {
3574 Op0 = ZExt->getOperand(0);
3576 } else if (const auto *SExt = dyn_cast<SExtInst>(Op0)) {
3578 if (isValueAvailable(SExt) && isTypeSupported(SExt->getSrcTy(), TmpVT)) {
3581 Op0 = SExt->getOperand(0);
3585 unsigned Op0Reg = getRegForValue(Op0);
3588 bool Op0IsKill = hasTrivialKill(Op0);
3590 switch (I->getOpcode()) {
3591 default: llvm_unreachable("Unexpected instruction.");
3592 case Instruction::Shl:
3593 ResultReg = emitLSL_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt);
3595 case Instruction::AShr:
3596 ResultReg = emitASR_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt);
3598 case Instruction::LShr:
3599 ResultReg = emitLSR_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt);
3605 updateValueMap(I, ResultReg);
3609 unsigned Op0Reg = getRegForValue(I->getOperand(0));
3612 bool Op0IsKill = hasTrivialKill(I->getOperand(0));
3614 unsigned Op1Reg = getRegForValue(I->getOperand(1));
3617 bool Op1IsKill = hasTrivialKill(I->getOperand(1));
3619 unsigned ResultReg = 0;
3620 switch (I->getOpcode()) {
3621 default: llvm_unreachable("Unexpected instruction.");
3622 case Instruction::Shl:
3623 ResultReg = emitLSL_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill);
3625 case Instruction::AShr:
3626 ResultReg = emitASR_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill);
3628 case Instruction::LShr:
3629 ResultReg = emitLSR_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill);
3636 updateValueMap(I, ResultReg);
3640 bool AArch64FastISel::SelectBitCast(const Instruction *I) {
3643 if (!isTypeLegal(I->getOperand(0)->getType(), SrcVT))
3645 if (!isTypeLegal(I->getType(), RetVT))
3649 if (RetVT == MVT::f32 && SrcVT == MVT::i32)
3650 Opc = AArch64::FMOVWSr;
3651 else if (RetVT == MVT::f64 && SrcVT == MVT::i64)
3652 Opc = AArch64::FMOVXDr;
3653 else if (RetVT == MVT::i32 && SrcVT == MVT::f32)
3654 Opc = AArch64::FMOVSWr;
3655 else if (RetVT == MVT::i64 && SrcVT == MVT::f64)
3656 Opc = AArch64::FMOVDXr;
3660 const TargetRegisterClass *RC = nullptr;
3661 switch (RetVT.SimpleTy) {
3662 default: llvm_unreachable("Unexpected value type.");
3663 case MVT::i32: RC = &AArch64::GPR32RegClass; break;
3664 case MVT::i64: RC = &AArch64::GPR64RegClass; break;
3665 case MVT::f32: RC = &AArch64::FPR32RegClass; break;
3666 case MVT::f64: RC = &AArch64::FPR64RegClass; break;
3668 unsigned Op0Reg = getRegForValue(I->getOperand(0));
3671 bool Op0IsKill = hasTrivialKill(I->getOperand(0));
3672 unsigned ResultReg = fastEmitInst_r(Opc, RC, Op0Reg, Op0IsKill);
3677 updateValueMap(I, ResultReg);
3681 bool AArch64FastISel::selectFRem(const Instruction *I) {
3683 if (!isTypeLegal(I->getType(), RetVT))
3687 switch (RetVT.SimpleTy) {
3691 LC = RTLIB::REM_F32;
3694 LC = RTLIB::REM_F64;
3699 Args.reserve(I->getNumOperands());
3701 // Populate the argument list.
3702 for (auto &Arg : I->operands()) {
3705 Entry.Ty = Arg->getType();
3706 Args.push_back(Entry);
3709 CallLoweringInfo CLI;
3710 CLI.setCallee(TLI.getLibcallCallingConv(LC), I->getType(),
3711 TLI.getLibcallName(LC), std::move(Args));
3712 if (!lowerCallTo(CLI))
3714 updateValueMap(I, CLI.ResultReg);
3718 bool AArch64FastISel::fastSelectInstruction(const Instruction *I) {
3719 switch (I->getOpcode()) {
3722 case Instruction::Add:
3723 case Instruction::Sub:
3724 return selectAddSub(I);
3725 case Instruction::Mul:
3726 if (!selectBinaryOp(I, ISD::MUL))
3727 return SelectMul(I);
3729 case Instruction::SRem:
3730 if (!selectBinaryOp(I, ISD::SREM))
3731 return SelectRem(I, ISD::SREM);
3733 case Instruction::URem:
3734 if (!selectBinaryOp(I, ISD::UREM))
3735 return SelectRem(I, ISD::UREM);
3737 case Instruction::Shl:
3738 case Instruction::LShr:
3739 case Instruction::AShr:
3740 return SelectShift(I);
3741 case Instruction::And:
3742 case Instruction::Or:
3743 case Instruction::Xor:
3744 return selectLogicalOp(I);
3745 case Instruction::Br:
3746 return SelectBranch(I);
3747 case Instruction::IndirectBr:
3748 return SelectIndirectBr(I);
3749 case Instruction::BitCast:
3750 if (!FastISel::selectBitCast(I))
3751 return SelectBitCast(I);
3753 case Instruction::FPToSI:
3754 if (!selectCast(I, ISD::FP_TO_SINT))
3755 return SelectFPToInt(I, /*Signed=*/true);
3757 case Instruction::FPToUI:
3758 return SelectFPToInt(I, /*Signed=*/false);
3759 case Instruction::ZExt:
3760 if (!selectCast(I, ISD::ZERO_EXTEND))
3761 return SelectIntExt(I);
3763 case Instruction::SExt:
3764 if (!selectCast(I, ISD::SIGN_EXTEND))
3765 return SelectIntExt(I);
3767 case Instruction::Trunc:
3768 if (!selectCast(I, ISD::TRUNCATE))
3769 return SelectTrunc(I);
3771 case Instruction::FPExt:
3772 return SelectFPExt(I);
3773 case Instruction::FPTrunc:
3774 return SelectFPTrunc(I);
3775 case Instruction::SIToFP:
3776 if (!selectCast(I, ISD::SINT_TO_FP))
3777 return SelectIntToFP(I, /*Signed=*/true);
3779 case Instruction::UIToFP:
3780 return SelectIntToFP(I, /*Signed=*/false);
3781 case Instruction::Load:
3782 return SelectLoad(I);
3783 case Instruction::Store:
3784 return SelectStore(I);
3785 case Instruction::FCmp:
3786 case Instruction::ICmp:
3787 return SelectCmp(I);
3788 case Instruction::Select:
3789 return SelectSelect(I);
3790 case Instruction::Ret:
3791 return SelectRet(I);
3792 case Instruction::FRem:
3793 return selectFRem(I);
3796 // fall-back to target-independent instruction selection.
3797 return selectOperator(I, I->getOpcode());
3798 // Silence warnings.
3799 (void)&CC_AArch64_DarwinPCS_VarArg;
3803 llvm::FastISel *AArch64::createFastISel(FunctionLoweringInfo &funcInfo,
3804 const TargetLibraryInfo *libInfo) {
3805 return new AArch64FastISel(funcInfo, libInfo);